Corporation tax return

Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 January 2021 to be submitted to HMRC.

Corporation tax payment

Corporation tax payment due for year-end 31 March 2021, for those companies not liable to pay their liability by instalments.

CT61

End of CT61 quarterly period.

Corporation tax return

Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 December 2020 to be submitted to HMRC.