Find out whether you should submit a tax return, what to do if HMRC sends you a tax return, and what to do if your circumstances change
Find out how what you need to do to file a self-employment tax return - both on paper and online
Find out whether or not you need to fill out HMRC's self-assessment tax return for the 2018-19 tax year.
Put these key dates for 2018-19 self-assessment tax returns in your diary to avoid a penalty for missing the deadlines.
Find out how to complete paper tax return, plus an explanation of any supplementary pages you might need
Find out how to make the process of submitting your tax return online as simple as possible.
Find out what happens if you file your tax return late, how to get help filling in your tax return, and what penalties you can face for sending HMRC incorrect information