What Should I Do If I Made a Mistake on My Tax Return?

Asked 5 months ago
If a taxpayer realizes they have made a mistake on their tax return, the appropriate course of action is to correct it as soon as possible to avoid any potential penalties or interest. HMRC provides guidance on how to rectify errors, which typically involves submitting an amended tax return or a particular form depending on the type of mistake. For example, if the error pertains to income, allowances, or deductions, it might require the taxpayer to fill out a new tax return with the accurate figures. It is essential to ensure that all relevant supporting documents and evidence accompany the correction when submitting it. Taxpayers should try to rectify the mistake before the deadline specified by HMRC, as corrections made after certain periods may be more complicated. Additionally, it is wise to check the current HMRC website for up-to-date information on procedures and to find any specific contact information needed for further assistance. This way, the taxpayer can ensure they are following the correct process and complying with the relevant regulations.
Adam Goldkamp is the editor / author responsible for this content.
Answered Jul 2, 2025

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