Self-employed people and some others file a Self Assessment tax return. Deadlines and penalties are on gov.uk.
Keep records throughout the year.
Sources
Last checked 22 Oct 2026. Rules change, so confirm on gov.uk.
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General information only. This page does not say whether you qualify for anything, and rules change, so check the linked gov.uk pages. For advice on your own case, use an IAA-registered adviser or a solicitor.