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Self Assessment tax returns - deadlines, who must send a tax return, penalties, corrections and returns for someone who has died.

• Overview

  Self Assessment is a system HM Revenue and Customs (HMRC) uses to collect…

• Who must send a tax return

  You must send a tax return if, in the last tax year (6 April to 5 April),…

• Registering and sending a return

  You must register for Self Assessment if you have to send a tax return and…

• If you no longer need to send a tax return

  You must tell HMRC if you believe you no longer need to send a tax return.…

• Deadlines

  HM Revenue and Customs (HMRC) must receive your tax return and any money…

• Penalties

  You’ll get a penalty if you need to send a tax return and you miss the…

• If you need to change your return

  You can make a change to a tax return after you filed it, for example…

• Claiming a tax refund

  You may be able to get a tax refund (also known as a ‘repayment’ or…

• How to get help

  If you need help with Self Assessment, you can: appoint someone to fill in…

• Returns for someone who has died

  If you’re the ‘personal representative’ (an executor or administrator) for…

Sign in and send your Self Assessment tax return online.

Use this tool to find out what you need to do to get a tax refund (rebate) if you’ve paid too much Income Tax.

Use this tool to find out if you need to send a tax return for the 2023 to 2024 tax year (6 April 2023 to 5 April 2024).

Self Assessment tax return forms for the current tax year

How to prepare a Company Tax Return for your limited company or unincorporated association - deadlines, corrections and penalties

Check how much Income Tax you paid to HM Revenue and Customs (HMRC) last year. Check your P800.

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.

Sign in or set up a personal or business tax account, Self Assessment, Corporation Tax, PAYE for employers, VAT and other services.

File your Company Tax Return with HMRC, and your company accounts with Companies House