Filing & Submissions

Filing & Submissions guides for self-employed.

Common Self Assessment Mistakes to Avoid When Filing

Common Self Assessment mistakes that trigger HMRC enquiries or penalties. Learn how to avoid these tax return errors and file accurately the first time.

11 January 2026

9 min read

Filing Your First Self Assessment Tax Return Online

A step-by-step guide to filing your first Self Assessment tax return online. Learn what information you need, how to submit, and avoid common mistakes.

11 January 2026