Collection

Self Assessment: detailed information

Guidance, forms and helpsheets for Self Assessment. Including filing returns, paying your bill, refunds, penalties, and help and support.

• From: HM Revenue & Customs
• Published: 12 February 2024

Get emails about this topic

You can ask HMRC’s digital assistant to find information about Self Assessment. If the digital assistant cannot help you, you can ask to transfer to an HMRC adviser if they’re available.

Get started

• Check if you need to send a Self Assessment tax return
• Self Assessment tax returns

Filling in your Self Assessment tax return

• Get help filling in your Self Assessment tax return
  • 2 June 2025
  • Collection

Sign in and file a tax return

• File your Self Assessment tax return online
• Use software to help complete your Self Assessment tax return
  • 1 May 2019
  • Guidance

Paying your tax bill

• Pay your Self Assessment tax bill
• Understand your Self Assessment tax bill
• If you cannot pay your tax bill on time

Record keeping

• Keeping your pay and tax records
• Get your SA302 tax calculation

Refunds, appeals and penalties

• Check how to claim a tax refund
• Disagree with a tax decision or penalty
• Estimate your penalty for late Self Assessment tax returns and payments

Help and support

• Check when you can expect a reply from HMRC
  • 25 June 2025
  • Guidance
• HMRC email updates, videos and webinars for Self Assessment
  • 27 June 2025
  • Guidance
• Help online with Self Assessment
  • 4 June 2025
  • Guidance
• Get help with tax

Published 12 February 2024