Sa370 2026

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The document is a form for appealing against penalties imposed for late filing or late payment of tax returns. It provides instructions on how to complete the appeal, including necessary personal details, the specific penalties being contested, and acceptable reasons for the appeal. The form must be submitted to HM Revenue and Customs within 30 days of receiving the penalty notice.

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Click ‘Get Form’ to open the SA370 in the editor.
Begin by entering your personal details in the 'About you' section. If you're appealing on behalf of someone else, ensure you input their information.
Fill in your tax reference number as shown on your penalty notice, along with your address and National Insurance number if known.
Indicate the penalties you wish to appeal against by entering the relevant tax year and amounts for each penalty. Be sure to include the dates from your penalty notices.
In the 'Your reason for making an appeal' section, tick the appropriate box and provide a brief description of your circumstances. If selecting 'Other acceptable excuse', elaborate further.
Finally, sign and date your appeal before sending it to Self Assessment, HM Revenue and Customs, BX9 1AS.

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