Corporation tax return

Filing deadline for corporation tax return self-assessment form CT600 for period ended 30 April 2018 to be submitted to HMRC.

CT61 payment

Due date for income tax for the CT61 period to 31 March 2019.

End of CT61 quarterly period.

Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 March 2018 to be submitted to HMRC.

Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends.