Personal pension and interest earned on savings

Hi, I have tried to make sense of the self help topics but can’t find the answer I am looking for for. I don’t have a state pension yet but do have a private one of 38,471 per annum gross, I pay tax on it deducted each month plus in the last financial year I have earnt £3738 in interest on some fixed rate savings accounts. When I go on line to see if I need to complete a self assessment it says I don’t ? I haven’t done self assessment for last 2 years as I only have this pension now and no longer a high earner. So my question is do I have to pay tax on the 3738 I have earnt in 23/24 and do I need to complete a self assessment form, or does it get deducted in the next financial year many thanks

Hi ,
 

Your banks and building societies confirm the bank interest you receive after the end of the tax year - if any tax is due on this after applying savings allowances, then we will contact you to confirm, and advise on ways that you can pay. If you have earned bank interest in previous tax years, though, an estimated amount of bank interest may have been present in your 23/24 tax code already, which should reduce the amount of tax left to pay. See : Tax on savings interest   . Thank you .