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

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

When you cannot file online

You cannot file a Self Assessment tax return online:

You must use commercial software or download other forms instead.

Sign in to file your tax return

You’ll need to prove your identity using Government Gateway or GOV.UK Verify.

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


Check how the new Brexit rules affect you

  1. Step 1 Check if being self-employed is right for you

  2. Step 2 Choose the name you want to trade under

    1. Check the rules for sole trader business names

    You can register a trade mark if you want to stop people from trading under your business name.

    1. Apply to register a trade mark
  3. Step 3 Check what records you'll need to keep

  4. Step 4 Register for tax

    To pay tax, you'll need to register for Self Assessment.

    1. Apply for a National Insurance number if you do not have one
    2. You are currently viewing: Register for Self Assessment

    You might need to register in a different way if:

    You may also need to register for VAT.

    1. Check if you need to register for VAT