Declare tax on savings

Hi for the first time ever I will need to declare tax on savings for 2023/2024 tax year-with an account I have with one of the large well known banks, which will take me over my personal allowance threshold. The amount is circa £2,800. How do I let HMRC know the figures. My bank said I have to do it and they certainly don’t tell HMRC and have therefore requested a tax certificate which I have got. Do I just write to HMRC attaching the certificate? I also want to pay what I owe as a lump sum, I do not want my tax code changing! Any help would be appreciated as I cannot get through on the phone, have tried multiple times, and there is no live web chat

Hi,

The bank should submit the untaxed interest details to HMRC after the tax year end.
If you want to submit the details you can submit in writing to HMRC at:

HMRC, Self Assessment & PAYE,
BX9 1AS UK.

Once reviewed if underpaid the underpayment will normally be collected by deduction in a future tax code to collect over 12 months.
If you want to pay as a one off once you have received the calculation you can make a payment or part payment by debit card or commercial credit card using your Personal Tax Account.

Personal tax account: sign in or set up

Thank you.