Your Self Assessment return

Please note: Self Assessment guidance from HM Revenue & Customs can be found on the GOV.UK website. We provide links to the key information below.

Check if you need to fill in a Self Assessment tax return
Who needs to complete and file a Self Assessment tax return for self-employed, employed, company directors, retired people and others

Register for Self Assessment
Register for Self Assessment - how and when to register and get a Unique Tax payer Reference (UTR) number

Self Assessment tax returns
Self Assessment tax returns - deadlines, who must send one, penalties, corrections and paying your tax bill

How to send your Self Assessment tax return online
How to file your Self Assessment tax return online - registering, getting a UTR, using HMRC's free online service and commercial software you can buy

Log in and file your Self Assessment tax return
Log in and send your Self Assessment tax return online or get help with lost user IDs, password or account activation codes

Tax compliance checks
What happens if HMRC opens a check into your Self Assessment tax return and what the results can be

Self Assessment deadlines
Self Assessment tax return deadlines - deadlines for your tax return and paying your tax

Self Assessment forms and helpsheets
Self Assessment tax return forms and helpsheets for the current tax year and three previous tax years

Software for Self Assessment tax returns
Get software to fill in your Self Assessment tax return, choose from a list of providers

Get help with tax
You can get help if you don't understand something about your tax