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If you make a mistake on your tax return, you've normally got 12 months from 31st January after the end of the tax year to correct or amend it. For example, if you send your 2018/19 online tax return by 31st January 2020, you have until 31st January 2021 to amend it. You can only amend your return after this timeframe if you received your return late (after 31st July). 

If you owe more tax or have to pay a penalty as a result of the mistake, HMRC should tell you how much you need to pay and when and how to pay it. If you think you're due a refund you can tell HMRC how you’d like to receive it.

If you sent your tax return electronically, you can also amend it online. If you send it in hard-copy, you don't need to send in the whole tax return again. Just write to HMRC and attached the pages you want to change.

If preparing your tax return is becoming a burden, please feel free to contact us. We would be happy to prepare your return for you. This should ensure your return is accurate and prepared in good time; and we will also look for any tax saving opportunities.

Last updated: 24th November 2020

This article is intended to inform rather than advise and is based on legislation and practice at the time. Taxpayer’s circumstances do vary and if you feel that the information provided is beneficial it is important that you contact us before implementation. If you take, or do not take action as a result of reading this article, before receiving our written endorsement, we will accept no responsibility for any financial loss incurred.

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