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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…

• 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 if you need to send a tax return for the 2023 to 2024 tax year (6 April 2023 to 5 April 2024).

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.

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

How to report your income and claim tax reliefs and any repayment due to you using the SA100 tax return.

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.

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

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

How to register for Self Assessment if you need to send a tax return or want to make voluntary Class 2 National Insurance payments.

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

Payment options for your Self Assessment tax bill - Direct Debit, bank transfer, through your tax code, debit or credit card, cheque and pay weekly or monthly

How to claim a refund in the current tax year if you are not getting taxable benefits or a pension from your employer and you've not started a new job (P50).

• Updated: 10 October 2023

Accounts for Companies House and Company Tax Returns for HMRC - what you must send, deadlines, filing separately or together

Helpsheets for your Self Assessment tax return.

• Updated: 4 July 2014

Use form SA900 to file a Trust and Estate Tax Return.

Get help, support and guidance with filling in your Self Assessment tax return.

• Updated: 19 January 2024

When and how to submit a return and how to make an amendment after it’s been submitted.

• Updated: 10 October 2022

Apply for a repayment of tax on your savings interest using form R40 if you do not complete a Self Assessment tax return.

• Updated: 14 May 2024