HICBC via PAYE

I recently came a cropper with HICBC, in short standard pension contributions reduced, reduced salary sacrifice and pay rise. I have completed my self assessment,made my online payment by online banking, how long should it take for the payment to show on my account? (Payment page indicate it should be almost instant max 72hours. On another age it indicates up to 6 working days.) Other posters on thisbforum have indicated that it is possible to have your PAYE code changed to account for HIBC. How does this work? How can I opt in?

Hi James Harvey,
If paid by internet banking it can take up to 7 working days to process to your Self Assessment account.
To pay the balance from your HICBC through your tax code the Self Assessment for 2022/23 had to be received by 30 December and the balance due would need to be less than £3000.
You would also need to have a PAYE source with high enough income to collect the balance.
Your tax code can be updated going forward to include the HICBC so you pay tax at source.
You will still need to complete the Self Assessment at the tax year end but should not have a large balance to pay as tax paid at source on HICBC.
To review/update your tax code you will need to contact HMRC:
Self Assessment: general enquiries
Thank you.