Tax code mismatch P60 to self assessment

In my P60 the tax code is 781T, implying I have 7810 of personal allowance in 2023 to 2024. But in my online self assessment calculation, no personal allowance is applied. Why the difference?

Hi,

This could be due to the amount of income you've declared on your Self Assessment return, as opposed the predicted income used to calculate your tax code.

To allow us to review you record and advise you correcly, contact our Self Assessment team at:

Self Assessment: general enquiries

Thank you.