Amendment to Self Assessment Tax Return

Dear HMRC, I submitted an amendment to my 2021/2022 Self Assessment Tax return online through my accountant. Despite doing so at the end of January 2024, HMRC hasn't processed my amendment yet. I’ve called HMRC, and the agent said there has been an error in the system, and therefore my amendment hasn't even been added to the queue for processing yet. The agents kindly sent multiple referrals and follow-up messages to the amendment team, but there hasn’t been any response. The change I need to make is to correct the input for Dividends from UK Companies (Box 4 on Page TR 3 of the SA100 Form). Consequently, some of the other values on the SA100 form, such as Total Tax and Student Loan Repayment Due, will also need adjustment. Since my amendment is not yet in the queue for processing, I am considering resubmitting it. As the deadline for online submission has passed (31st January 2024), I believe I will have to write to the HMRC by post. My accountant has already prepared the corrected SA100 Form and I can simply post this to the HMRC. Is that sufficient or do I need to post any additional documents? Your advice on this matter is greatly appreciated. Best regards, GDR

Hi GDR,
You do not need to submit any additional documents. Details of how to submit the amendment in writing at Self Assessment tax returns.
Thank you.