How to amend the submitted file

Dear Admin, My 2022-23 self-assessment has been submitted and tax calculation was received by post last week.However, I found that I made a wrong selection on page Box no.1,TR2,Form100 which Employment should be YES therefore my PAYE 's record did not fill in.I cannot amend this mistake online since over 72 hours after submission of file.Please let me know what next should I do ,THANKS!

Hi,

If you submitted by post then you will not be able to amend the tax return onine. You will need to submit the employment page SA102 with covering letter to HMRC, Self Assessment & PAYE, BX9 1AS, UK. You can download the SA102.

Self Assessment: Employment (SA102)

Thank you.