When does your tax return need to be filed?

If your tax return is filed electronically it must be filed with HMRC by 31 January after the end of the tax year.

If we are engaged as your accountants to file your tax return we will take care of this for you.

The tax year runs from the 6th April to the following 5th April.

For the self-employed HMRC see the period 1 April - 31 March as the same as 6 April to 5 March, so it's often easier to just round off your periods and use the former.