File your Tax Return Online
You can use the online service to:
- fill in and send your tax return to HM Revenue and Customs (HMRC)
- go back to a tax return you’ve already started
- check your details, view returns and print your tax calculation
You will need to register for Self Assessment again if you have sent a tax return in the past but you did not have to send one last year.
If you are Filing Online for the First Time
You must have received your Unique Taxpayer Reference (UTR), enrolled for the online service and activated your account using the code you received in the post.
How you do those things depends on whether you’re:
Sign in to File your Tax Return
You will need to prove your identity using Government Gateway or GOV.UK Verify.
Sign In
If you Have Not Told HMRC you Need to Send a Return
There are different ways to register for Self Assessment if you are:
You should allow enough time to complete the registration process so you can send your return by the deadline.
When you Cannot Use the Service
You need to use commercial software or download other forms to send a Self Assessment tax return:
- for a partnership
- for a trust or estate
- if you lived abroad as a non-resident
- to report multiple ‘chargeable gains’, for example from life insurance
- if you get income from a trust, you are a Lloyd’s underwriter or a religious minister