This calendar lists every deadline that applies to a company in Lithuania in 2028: national tax and reporting duties alongside EU-wide regulations - such as the AI Act, NIS2 and the Cyber Resilience Act - that apply across the whole EU.
Recurring obligations - monthly VAT returns, quarterly filings, annual reports - are expanded into their individual due dates for the year using the rule shown on each deadline's own page. This calendar does not shift dates that fall on a weekend or public holiday; always check the linked official source for the exact filing deadline.
Data last verified 9 September 2026. See the source cited on each deadline
The Omnibus I package cut CSRD scope to companies with more than 1,000 employees and over €450M turnover; listed SMEs are removed entirely. Large customers may not demand more sustainability data from suppliers below 1,000 employees than the voluntary VSME standard. In-scope companies report for financial year 2027 in 2028.
Details →Lithuania has not adopted, and has not published an official target date for, a domestic mandatory B2B e-invoicing regime. The state's SABIS platform (live since July 2024) already handles mandatory B2G e-invoicing for public-sector suppliers and is the most likely rail for any future B2B extension, but no bill or government notice of intent for B2B has been identified as of this verification.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →Businesses that place packaged products, packaging, or certain other EPR-regulated goods on the Lithuanian market must report quarterly through GPAIS, the state's unified products/packaging/waste accounting information system: a quarterly summary is auto-generated 29 days after each quarter ends and must be confirmed by the 30th day after quarter-end.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Businesses established in Lithuania that are voluntarily registered for the EU One-Stop-Shop (OSS) scheme must file a single quarterly VAT return covering their distance sales of goods or digital/other services to consumers in other EU member states, and pay any VAT due, via VMI's OSS portal by the last day of the month following each calendar quarter.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →Employers and other payers of income to individuals in Lithuania must file an annual information return (GPM312) summarising all A-class and B-class income paid to natural persons during the calendar year, separate from the monthly GPM313 withholding declarations.
Details →Businesses that place packaged products, packaging, or certain other EPR-regulated goods on the Lithuanian market must report annually through GPAIS: the annual report for a calendar year must be generated in GPAIS by 30 January of the following year and confirmed by 19 February.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Lithuanian companies above a taxable-income threshold must pay advance corporate income tax in quarterly instalments (form FR0430), due by the 15th of the last month of each quarter. Companies whose taxable income in the preceding tax year did not exceed roughly EUR 300,000, and companies in their first tax period after registration, are exempt from advance payments.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Businesses that place packaged products, packaging, or certain other EPR-regulated goods on the Lithuanian market must report quarterly through GPAIS, the state's unified products/packaging/waste accounting information system: a quarterly summary is auto-generated 29 days after each quarter ends and must be confirmed by the 30th day after quarter-end.
Details →Businesses established in Lithuania that are voluntarily registered for the EU One-Stop-Shop (OSS) scheme must file a single quarterly VAT return covering their distance sales of goods or digital/other services to consumers in other EU member states, and pay any VAT due, via VMI's OSS portal by the last day of the month following each calendar quarter.
Details →A resident individual carrying out individual activity under an individual activity certificate (individuali veikla, distinct from the simplified verslo liudijimas regime) must file an annual personal income tax return (GPM311) declaring income and allowable expenses from that activity, and pay any income tax due, by 4 May 2027 for the 2026 tax year (the exact date is set annually and should be reconfirmed each year).
Details →A self-employed individual operating under an individual activity certificate must settle their annual state social insurance (VSD) and compulsory health insurance (PSD) contributions based on declared individual-activity income for the year, alongside the annual income tax return, by 4 May 2027 for the 2026 contribution year (the exact date is republished annually by Sodra).
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Lithuanian public and private limited companies (AB/UAB) must hold the annual shareholders' meeting approving the annual financial statements AND file the approved set (plus management report and, where required, auditor's/sustainability-assurance opinion) with the Centre of Registers' Legal Entities Register (JAR) within a single combined 5-month window from financial year end.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Lithuanian companies above a taxable-income threshold must pay advance corporate income tax in quarterly instalments (form FR0430), due by the 15th of the last month of each quarter. Companies whose taxable income in the preceding tax year did not exceed roughly EUR 300,000, and companies in their first tax period after registration, are exempt from advance payments.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →Every Lithuanian company liable to corporate income tax must file its annual CIT return (PLN204 or the applicable variant) and settle any balance due by the 15th day of the 6th month after the tax period ends - 15 June for a standard calendar-year tax period - via VMI's electronic declaration system (EDS).
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Platforms facilitating short-term accommodation rentals (up to 30 nights) and passenger transport become the deemed VAT supplier when the underlying host or driver does not charge VAT. The One-Stop-Shop is extended (own-goods transfers, B2C supplies) and a mandatory reverse charge for non-established suppliers reduces the need for foreign VAT registrations.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →Businesses that place packaged products, packaging, or certain other EPR-regulated goods on the Lithuanian market must report quarterly through GPAIS, the state's unified products/packaging/waste accounting information system: a quarterly summary is auto-generated 29 days after each quarter ends and must be confirmed by the 30th day after quarter-end.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Businesses established in Lithuania that are voluntarily registered for the EU One-Stop-Shop (OSS) scheme must file a single quarterly VAT return covering their distance sales of goods or digital/other services to consumers in other EU member states, and pay any VAT due, via VMI's OSS portal by the last day of the month following each calendar quarter.
Details →AI that is a safety component of products covered by EU product legislation listed in Annex I (machinery, medical devices, toys, lifts, vehicles, etc.) must meet the AI Act's high-risk requirements as part of the product's CE conformity assessment.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Lithuanian companies above a taxable-income threshold must pay advance corporate income tax in quarterly instalments (form FR0430), due by the 15th of the last month of each quarter. Companies whose taxable income in the preceding tax year did not exceed roughly EUR 300,000, and companies in their first tax period after registration, are exempt from advance payments.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →Businesses that place packaged products, packaging, or certain other EPR-regulated goods on the Lithuanian market must report quarterly through GPAIS, the state's unified products/packaging/waste accounting information system: a quarterly summary is auto-generated 29 days after each quarter ends and must be confirmed by the 30th day after quarter-end.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Businesses established in Lithuania that are voluntarily registered for the EU One-Stop-Shop (OSS) scheme must file a single quarterly VAT return covering their distance sales of goods or digital/other services to consumers in other EU member states, and pay any VAT due, via VMI's OSS portal by the last day of the month following each calendar quarter.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Companies whose intra-EU trade in goods (arrivals from, or dispatches to, other EU member states) exceeds an annually-set EUR threshold must file a monthly Intrastat statistical declaration, due by the 10th of the month following the reference month.
Details →Lithuanian companies above a taxable-income threshold must pay advance corporate income tax in quarterly instalments (form FR0430), due by the 15th of the last month of each quarter. Companies whose taxable income in the preceding tax year did not exceed roughly EUR 300,000, and companies in their first tax period after registration, are exempt from advance payments.
Details →Employers and other payers of income subject to Lithuanian personal income tax (GPM), such as salary, board member fees, or other GPM-withholdable payments, must submit the monthly declaration GPM313 to VMI by the 15th day of the month following the month of payment. The tax withheld must itself be paid on a schedule tied to the payment date within the month, not uniformly on the 15th.
Details →Employers must submit the monthly SAM report to Sodra (the State Social Insurance Fund Board), listing each insured person's calculated insurable income and contributions for the reporting month, and pay the calculated state social insurance (VSD) contributions, both by the 15th day of the following calendar month.
Details →VAT-registered legal entities with a monthly VAT tax period must submit their register of issued and received VAT invoices (i.SAF) to VMI's i.MAS system by the 20th day of the month following the reporting period, even when no invoices were issued or received (an empty register must still be submitted).
Details →VAT-registered businesses in Lithuania with a monthly tax period must file their VAT return (form FR0600) with VMI and pay any VAT due by the 25th day of the month following the tax period. Registration as a VAT payer is mandatory once taxable turnover from VAT-taxable supplies in Lithuania exceeds €45,000 in the current or preceding calendar year.
Details →A self-employed individual operating under an individual activity certificate must pay at least the minimum compulsory health insurance (PSD) contribution every month, independent of the annual VSD/PSD settlement filed with the yearly income tax return.
Details →Both. It combines every national deadline for this country with EU-wide regulations - such as the AI Act or NIS2 - that apply to companies here regardless of country.
Each recurring obligation (a monthly VAT return, a quarterly filing) is expanded into its actual due date for every month, quarter or year it applies, using the recurrence rule published on its own deadline page.
Every entry links to its official source and shows a last-verified date. Dates can move, so always confirm against the official source before relying on one.
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