It might not always be obvious you need to do a tax return, especially if you have always paid tax through PAYE, or have not been a higher-rate taxpayer.
You must send a tax return if, in the last tax year (6 April to 5 April), any of the following applied to you:-
• you were self-employed as a ‘sole trader’ and earned more than £1,000 (before taking off anything you
…