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Money, tax and benefits
Self Assessment - your tax return
Missed the tax return deadline?
Find out about penalties, how to pay or appeal and when to contact HM Revenue & Customs
Introduction to Self Assessment
What Self Assessment means, who needs to complete a tax return and how to get one including how to get a tax reference
Completing tax returns and keeping records
Information you'll need to complete your tax return, key steps and common mistakes
File your tax return online
Save time and get your tax calculated automatically when you file your tax return online including how to sign up and view your account online
Understanding your tax bill and how to pay
Understanding your tax calculation or statement, payment deadlines and problems paying, corrections and refunds
Correcting your tax return and claiming any refund
How to correct a mistake on your tax return and get back any tax that's owed because of the error or pay any extra tax that's due
Tax return deadlines, checks, penalties and appeals
How to appeal against a tax decision, payment deadlines and penalties including when and why checks are made into your tax return
Tax returns, forms and help sheets Opens new window
Quick links to the forms and any associated, notes, helpsheets, supplementary pages and guides you'll need to fill in your tax return
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