HM Revenue and Customs gov.uk

Complete your Self Assessment tax return for the last tax year

Imported from official source

September 30, 2025 23:00

Finance Classified by Officially

You can file your tax return online — 97% of people already do it this way.

it’s easier to make amendments and more secure

you’ll have an extra 3 months to send it to us

you do not have to complete it all at once — you can save your details and finish it later

You can also use the guidance notes to help you fill in your tax return.

This file may not be suitable for users of assistive technology.

You may need to fill in and send additional forms, known as supplementary pages, along with your SA100 tax return.

There are supplementary forms if you are:

an employee or company director —SA102: Employment

a clergyman or a minister of religion —SA102M: Ministers of religion

a member of Parliament (MP) or a minister —SA102MP: Parliament

a member of the Senedd Cymru (Welsh Parliament) —SA102MS: The National Assembly of Wales

a member of the Northern Ireland Legislative Assembly —SA102MLA: Northern Ireland Legislative Assembly

a member of the Scottish Parliament —SA102MSP: Scottish Parliament

an underwriting member of Lloyd’s —SA103L: Lloyd’s underwriters

There are also supplementary forms if you need to record:

less common types of income, deductions and tax reliefs —SA101: Additional information

income you received from a trust, settlement or deceased person’s estate —SA107: Trusts etc

the results of your tax calculation —SA110: Tax calculation

You’ll need to post your tax return to HMRC.

Self Assessment
HM Revenue & Customs
BX9 1AS
United Kingdom

HM Revenue & Customs
Benton Park View
Newcastle Upon Tyne
NE98 1ZZ
United Kingdom

HMRC must receive your paper tax return by the deadline.

If you miss the paper filing deadline, send your tax return online instead to avoid a penalty.

This is an extract. The publication continues at the source.

Read the original at the source: https://www.gov.uk/guidance/how-to-complete-your-self-assessment-tax-return-for-last-tax-year

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Organization: HM Revenue and Customs — imported from official source
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Imported: September 26, 2026 10:07
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Identity: https://www.gov.uk/guidance/how-to-complete-your-self-assessment-tax-return-for-last-ta...