Student loan payment overstated on tax calculation

My self assessment return is ready to file for 22-23 but it is stating that it is adding £2943 in student loan payments, at the year end my outstanding loan balance was only £814. I have tried calling the helpline repeatedly but I am unable to get through, is there a quick solution for me to amend this on my tax return? I am needing a quick resolution as require an SA302 for a mortgage, but didn't want to file and be forced to overpay then have to reclaim, Thanks in advance

Hi Michael Peters,
Once you submit the Self Assessment tax return the student loan company would advise HMRC of the correct balance and the calculation will be updated accordingly. 
Thank you 

Hello, I have the same issue. My tax was calculated when I filed in June 2024 so I’ll be paying the balancing payment (which includes the overstated student loan repayment) in January 2025. When will the recalculation happen? Should I expect to receive correspondence before I pay in January or will I overpay and get issued a refund from HMRC? Thanks, 

Name removed admin 

Hi,
If you filed the return onlne, you can amend it yourself for an immediate update. if filed by paper and sent the amendment by post, you can check.
Check when you can expect a reply from HMRC
Thank you.

Hi, I filed using a third party software because my permanent residence is abroad. Even so, I don't see what there is to amend as there isn't a part regarding the student loan for me to edit as this is automatically calculated. Thank you