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 make the process of submitting your tax return online as simple as possible.
Find out what a unique tax reference (UTR) number is, how you can get one from HMRC and what you'll need to use it for.
Find out how to complete paper tax return, plus an explanation of any supplementary pages you might need