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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鈥�
You must send a tax return if, in the last tax year (6 April to 5 April),鈥�
You must register for Self Assessment by 5 October if you need to complete鈥�
You can send a tax return by either: submitting an online return sending a鈥�
You must tell HMRC as soon as possible if you believe you no longer need鈥�
HM Revenue and Customs (HMRC) must receive your tax return and any money鈥�
You鈥檒l get a penalty if you need to complete a tax return and you: send鈥�
You can make a change to a tax return after you filed it, for example鈥�
You may be able to get a tax refund (also known as a 鈥榬epayment鈥� or鈥�
If you need help with Self Assessment, you can: appoint someone to fill in鈥�
If you鈥檙e the 鈥榩ersonal representative鈥� (an executor or administrator) for鈥�
Use this tool to find out if you need to send a tax return for the 2024 to 2025 tax year (6 April 2024 to 5 April 2025).
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 and send your Self Assessment tax return online.
Get help with Self Assessment by using online tools and guidance, and watching HMRC YouTube videos.
Check whether you need to report and pay any tax on income you make apart from your main job or earnings.
When you may need to make a change to your Self Assessment tax return for SEISS payments, and how to do it.
Understand your Self Assessment tax bill - your tax calculation, statement, balancing payments, payments on account.
Self Assessment tax return forms for the current tax year
Use form SA1 to register for Self Assessment for any reason other than self-employment.
Don鈥檛 include personal or financial information like your National Insurance number or credit card details.
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