CT61
End of CT61 quarterly period.
End of CT61 quarterly period.
End of corporation tax financial year.
Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends.
Filing deadline for corporation tax return self-assessment form CT600 for period ended 31 March 2017 to be submitted to HMRC.
Government will not extend disincorporation relief beyond the 31 March 2018 expiry date.