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 Wiederkehrend 15. September 2026 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Wiederkehrend 20. September 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 20. September 2026 Estonia VAT (recapitulative statement) Estonia: recapitulative statement of intra-Community supplies (VD) due by the 20th 10. Oktober 2026 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 20. Oktober 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 31. Oktober 2026 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Wiederkehrend 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 Wiederkehrend 20. November 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 2. Dezember 2026 EU AI Act AI Act: Ende der Übergangsfrist für die Kennzeichnung KI-generierter Inhalte in Bestandssystemen; Verbot von Generatoren für nicht einvernehmliche intime Deepfakes 10. Dezember 2026 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 15. Dezember 2026 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Wiederkehrend 20. Dezember 2026 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 24. Dezember 2026 eIDAS 2 EU Digital Identity Wallet: jeder Mitgliedstaat muss eine Brieftasche anbieten; öffentliche Stellen müssen sie akzeptieren 1. Januar 2027 Estonia e-invoicing Estonia: proposed mandatory e-invoicing for all VAT-taxable B2B transactions from 2027 10. Januar 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 12. Januar 2027 Data Act Data Act: Cloud-Anbieter dürfen keine Wechsel- und Datenausgangsgebühren mehr verlangen 20. Januar 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 31. Januar 2027 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Wiederkehrend 10. Februar 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 20. Februar 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 10. März 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 15. März 2027 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Wiederkehrend 20. März 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 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 Wiederkehrend 20. April 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 30. April 2027 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Wiederkehrend 30. April 2027 Estonia Income Tax Act (Tulumaksuseadus) Estonia: self-employed person (FIE) income tax return (Vorm E) due 30 April Wiederkehrend 10. Mai 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 20. Mai 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 10. Juni 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 15. Juni 2027 Estonia Social Tax Act (Sotsiaalmaksuseadus) Estonia: self-employed person (FIE) social tax advance payment due by the 15th, quarterly Wiederkehrend 20. Juni 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 30. Juni 2027 Estonia annual report filing Estonia: annual report (majandusaasta aruanne) filing deadline to the business register Wiederkehrend 30. Juni 2027 Estonia AML Act (Rahapesu ja terrorismi rahastamise tõkestamise seadus) Estonia: annual confirmation/update of beneficial owner (UBO) data in the business register Wiederkehrend 9. Juli 2027 Instant Payments Regulation Sofortzahlungsverordnung: Senden von Euro-Echtzeitüberweisungen und Empfängerprüfung verpflichtend für Banken außerhalb des Euroraums (Polen, Schweden, Tschechien usw.) 10. Juli 2027 Estonia corporate income tax on distributed profit Estonia: income tax on distributed dividends (TSD Annex 7 / INF 1) due by the 10th Wiederkehrend 20. Juli 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend 31. Juli 2027 Estonia / EU One Stop Shop (OSS) VAT Estonia: OSS quarterly VAT return due by the end of the following month Wiederkehrend 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 Wiederkehrend 20. August 2027 Estonia KMD (VAT return) Estonia: VAT return (KMD) filing and VAT payment due by the 20th Wiederkehrend