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The SA101 is one of the supplementary forms that you can attach to the SA100 main Self Assessment tax return form if you need to declare less common types of income, deductions, and tax reliefs.
Examples of these additional sources of revenue include:
You can download the SA101 from HMRC’s website. Just like with the main SA100 form, you don’t need to file the SA101 if you file your tax return online. To learn more about the SA100 form for Self Assessment tax returns, you can visit our SA100 glossary page.
Of course! We advise that you start a comprehensive spreadsheet to keep track of your taxable income and relevant expenses throughout the year in order to make your tax return more straightforward. This can be done on an Excel spreadsheet or Google sheet to keep things simple! Contact our team for more advice today!
If you are a self-employed contractor, remember to file your Self Assessment by 31st January the year after the tax year you’re paying for. For example, if you’re paying your 2023/2024 tax return, this should be paid by 31st January 2025.