Only certain people will need to send a tax return if, in the last tax year, any of the following applied:

• An individual was self-employed as a ‘sole trader’ and earned more than £1,000 - before taking off anything a person can claim tax relief on
• An individual was a partner in a business partnership
• An individual earned £100,000 or more.

People can choose to fill in a tax return to claim income tax reliefs, or prove they are self-employed, for example to claim Tax-Free Childcare or Maternity Allowance.

Individuals can make a change to their tax return 72 hours after they have filed it - for example, because they made a mistake.

The changes need to be made by: 

• 31 January 2023 for the 2020 to 2021 tax year
• 31 January 2024 for the 2021 to 2022 tax year

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