File your Self Assessment tax return online

You can file your Self Assessment tax return online if you:

  • are self-employed
  • are not self-employed but you still send a tax return, for example because you receive income from renting out a property

This service is also available in Welsh (Cymraeg).

You can also use the online service to:

  • view returns you’ve made before
  • check your details
  • print your tax calculation

If you did not file a tax return last year

You must register for Self Assessment before using this service if:

  • you’re filing for the first time
  • you’ve sent a tax return in the past but did not send one last tax year

Check how to register for Self Assessment.

When you cannot use this service

You cannot use this service to file your tax return online:

Use commercial software or download or request other forms instead.

If you’re sending an SA100 tax return for the 2021 to 2022 tax year or earlier, get forms from the National Archives.

Sign in to file your tax return

To use this service, you’ll need to sign in using your Government Gateway user ID and password.

You’ll also need your Unique Taxpayer Reference (UTR) number.

You do not have to complete your return in one go. You can save your entry and go back to it later if you need to.

Sign in

If you do not have a Government Gateway account

You’ll have to prove your identity to register for Government Gateway if you have not used it before.

You’ll need your National Insurance number or postcode and 2 of the following:

  • a valid UK passport
  • a UK photocard driving licence issued by the DVLA (or DVA in Northern Ireland)
  • a payslip from the last 3 months or a P60 from your employer for the last tax year
  • details of a tax credit claim if you made one
  • details from a Self Assessment tax return if you made one
  • information held on your credit record if you have one (such as loans, credit cards or mortgages)

Related content