You must send a tax return if, in the last tax year (6 April to 5 April), any of the following applied:
- you were self-employed as a ‘sole trader’ and earned more than £1,000 (before taking off anything you can claim tax relief on)
- you were a partner in a business partnership
- you had a total taxable income of more than £100,000
- you had to pay the High Income Child Benefit Charge
You may also need to send a tax return if you have any untaxed income, such as:
- some COVID-19 grant or support payments
- money from renting out a property
- tips and commission
- income from savings, investments and dividends
- foreign income
