10 September 2026 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 15 September 2026 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Recurring 20 September 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 20 September 2026 Estonia VAT (recapitulative statement) Estonia: recapitulative statement of intra-Community supplies (VD) due by the 20th 10 October 2026 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 October 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 31 October 2026 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Recurring 10 November 2026 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 November 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 2 December 2026 EU AI Act AI Act: end of grace period for marking AI-generated content in pre-existing systems; ban on non-consensual intimate deepfake generators 10 December 2026 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 15 December 2026 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Recurring 20 December 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 24 December 2026 eIDAS 2 EU Digital Identity Wallet: every Member State must offer a wallet; public bodies must accept it 1 January 2027 Estonia e-invoicing Estonia: proposed mandatory e-invoicing for all VAT-taxable B2B transactions from 2027 10 January 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 12 January 2027 Data Act Data Act: cloud providers must stop charging switching and data-egress fees 20 January 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 31 January 2027 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Recurring 10 February 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 February 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 10 March 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 15 March 2027 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Recurring 20 March 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 10 April 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 April 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 30 April 2027 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Recurring 30 April 2027 Estonia Income Tax Act (Tulumaksuseadus) Estonia: self-employed person (FIE) income tax return (Vorm E) due 30 April Recurring 10 May 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 May 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 10 June 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 15 June 2027 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Recurring 20 June 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 30 June 2027 Estonia annual report filing Estonia: annual report (majandusaasta aruanne) filing deadline to the business register Recurring 30 June 2027 Estonia AML Act (Rahapesu ja terrorismi rahastamise tõkestamise seadus) Estonia: annual confirmation/update of beneficial owner (UBO) data in the business register Recurring 9 July 2027 Instant Payments Regulation Instant Payments Regulation: sending instant euro payments and Verification of Payee mandatory for non-euro-area banks (Poland, Sweden, Czechia, etc.) 10 July 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 July 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring 31 July 2027 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Recurring 10 August 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Recurring 20 August 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Recurring