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How to register for Self Assessment if you need to send a tax return or want to make voluntary Class 2 National Insurance payments.
Use form SA1 to register for Self Assessment for any reason other than self-employment.
Self Assessment tax returns - deadlines, who must send a tax return, penalties, corrections and returns for someone who has died.
Self Assessment is a system HM Revenue and Customs (HMRC) uses to collect…
You must send a tax return if, in the last tax year (6 April to 5 April),…
You must register for Self Assessment if you have to send a tax return and…
You must tell HMRC if you believe you no longer need to send a tax return.…
HM Revenue and Customs (HMRC) must receive your tax return and any money…
You’ll get a penalty if you need to send a tax return and you miss the…
You can make a change to a tax return after you filed it, for example…
If you need help with Self Assessment, you can: appoint someone to fill in…
If you’re the ‘personal representative’ (an executor or administrator) for…
Sign in and send your Self Assessment tax return online.
Sign in or set up a personal or business tax account, Self Assessment, Corporation Tax, PAYE for employers, VAT and other services.
Register as a sole trader with HM Revenue and Customs - your legal responsibilities if you run a business as a self-employed sole trader.
Register for Self Assessment and Class 2 National Insurance when you've joined a partnership using form SA401.
Registering for Self Assessment is an essential requirement for people with an untaxed income.
Register a new partner who is not an individual for Self Assessment, for example a company or trust, using form SA402.
What makes you self-employed, what counts as trading and what to do, including registering for Self Assessment.
Sign into or set up a personal tax account to check and manage HMRC records, including Income Tax, change of address, Self Assessment and company car tax.
What you need to do if you set up as a sole trader - check your employment status, understand your obligations, and register for tax.
Register a new partnership for Self Assessment using form SA400.
Where to find your unique tax reference (UTR) number, what to do if you've lost your UTR number, or how to apply if you do not have a UTR number
Find out how to register your client for Self Assessment, Corporation Tax, PAYE, VAT or their trust or estate.
How to get online help with Self Assessment from HMRC by using our digital assistant, community forums, YouTube videos and online tools.
Find out what the Self Assessment for Agents online service is for, what you can do in the service and how to do it.
Taxpayers who are unsure if they need to submit a Self Assessment tax return can use HMRC's online tool to help them work out what they need to do.
Learn more about getting started with Self Assessment including registration, tax returns, tax bills and payments.
300,000 early birds file their Self Assessment tax return in the first week of the new tax year.
Don’t include personal or financial information like your National Insurance number or credit card details.
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