- 21 November 2021 (23rd November 2021 for online payment and filing):
Bi-monthly VAT 3 Return and payment for the period September/October 2021
- 21 November 2021 (23rd November 2021 for online payment and filing):
Corporation Tax Return CT 1 and final payment for companies with accounting periods ending 28 February 2021
- 21 November 2021 (23rd November 2021 for online payment and filing):
Preliminary Corporation Tax due (where liability is less than €200,000) for accounting periods ending 31 December 2021
- 31 December 2021:
Form 46G for companies with accounting periods ending 28 February 2021
