The following guidelines are reproduced from the government’s website:

You must send a tax return if, in the last tax year (6 April to 5 April), you were:

  • self-employed as a ‘sole trader’ and earned more than £1,000
  • a partner in a business partnership

You will not usually need to send a return if your only income is from your wages or pension. But you may need to send one if you have any other untaxed income, such as:

  • money from renting out a property
  • tips and commission
  • income from savings, investments and dividends
  • foreign income

Other reasons for sending a return

You can choose to fill in a tax return to:

  • claim some Income Tax reliefs
  • prove you’re self-employed, for example to claim Tax-Free Childcare or Maternity Allowance

If your income (or your partner’s, if you have one) was over £50,000, you may need to send a return and pay the High Income Child Benefit Charge.

Unfortunately, this is just the tip of the iceberg. For example, you may have to submit a return if you have made significant capital gains in a tax year.

If you are at all uncertain if you do need to file, please call. There are significant penalties for failing to register and submit a return. The deadline to register for the tax year 2018-19 is imminent, 5 October 2019, and so action should not be delayed.

If your circumstances have only recently changed – during the current 2019-20 tax year – you have more time, but it is worth getting the registration process completed so you can start to plan for any tax payments that may fall due 2020 and beyond.