Sa103f 2026

1. Click ‘Get Form’ to open the sa103f in the editor.
2. Begin by entering your name and Unique Taxpayer Reference (UTR) in the designated fields at the top of the form.
3. In the 'Business details' section, provide your business name, description, and relevant dates such as start date and end date if applicable.
4. Fill in your business address and postcode. If there have been any changes in the last 12 months, indicate this accordingly.
5. Proceed to enter your business income in box 15, detailing turnover and any other income not included in box 15.
6. Complete the 'Business expenses' section by listing all relevant expenses. Ensure you differentiate between total expenses and disallowable expenses.
7. Calculate your net profit or loss based on the provided figures and follow through with capital allowances if applicable.
8. Finally, review all entries for accuracy before saving or exporting your completed form directly from our platform.

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