Self Assessment is a system HM Revenue and Customs (HMRC) uses to collect Income Tax.
Tax is usually deducted automatically from wages, pensions and savings. People and businesses with other income must report it in a tax return.
If you need to send one, you fill it in after the end of the tax year (5 April) it applies to.
Sending your return
File your tax return online or send a paper form.
If your business has been affected by coronavirus (COVID-19), you may be able to claim a grant through the Self-Employment Income Support Scheme.
Deadlines
Send your tax return by the deadline.
If you did not send an online return last year, allow extra time (up to 20 working days) as you’ll need to register first. There are different ways to register if you’re:
Filling in your return
You need to keep records (for example bank statements or receipts) so you can fill in your tax return correctly.
You can get help filling in your return.