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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.
Sign in and send your Self Assessment tax return online.
Self Assessment tax returns - deadlines, who must send a tax return, penalties, corrections and returns for someone who has died.
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.
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.
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
Use the online forms service or the postal form to register for Self Assessment if you've joined a partnership.
Use the online forms service or postal forms to register a new partnership for Self Assessment.
What you need to do if you set up as a sole trader - check your employment status, understand your obligations, and register for tax.
Find out how to register your client for Self Assessment, Corporation Tax, PAYE, VAT or their trust or estate.
Use the online service or the postal form to register a partner who is not an individual for Self Assessment, for example a company or trust.
Learn more about getting started with Self Assessment including registration, tax returns, tax bills and payments.
Registering for Self Assessment is an essential requirement for people with an untaxed income.
Tell HMRC if you've stopped being self-employed, or you're ending or leaving a business partnership - responsibilities, tax returns, letting any employees know.
Find out what the Self Assessment for Agents online service is for, what you can do in the service and how to do it.
How to get online help with Self Assessment from HMRC by using our digital assistant, community forums, YouTube videos and online tools.
Register your client’s estate online if you’re a tax agent or adviser.
Don’t include personal or financial information like your National Insurance number or credit card details.
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