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Posted Wed, 01 Feb 2023 13:06:45 GMT by Theon H
I submitted my SA last week, but have subsequently spotted a mistake. I can't see any way of issuing a correction to this submission. Please can you advise how I can submit the correction. Thanks
Posted Fri, 03 Feb 2023 11:36:52 GMT by Peter
Follow-up question: I submitted my Self Assessment on 31 January, but spotted a mistake now and need to amend my filing. This mistake doesn't affect the amount of tax I needed to pay. Will I face a £100 late filing penalty if: a. I amend my filing using Online Self Assessment, within 72 hours of initial submission? b. More than 72 hours has passed, and I contact HMRC to amend my filing?
Posted Fri, 03 Feb 2023 15:35:10 GMT by HMRC Admin 25
Hi Theon H,

If you please follow the link it has advice on how to access the return to amend:

Self Assessment tax returns

Thank you. 
Posted Wed, 08 Feb 2023 16:07:21 GMT by HMRC Admin 25
Hi Peter 9728

There would not be a penalty if the change doesnt change the tax due.

Thank you. 

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