breakdown of tax payment calculation

I've just been informed of my amount of tax payable for the tax year 2022-2023 through my online personal tax account. However, I cannot find any details of how the amount was calculated, and I do have some queries about the amount. Can I ask for a breakdown of the tax payment calculation, and how? In case I suspect the amount of tax payable was wrongly calculated, can I make an appeal, and how? Should I pay that amount of tax payable first, and make the appeal later, or the other way round? Please advise. Thank you.

Hi C Lo,
If you have underpaid your tax then you should have received a calculation with a breakdown, the calculation once issued can take up to 2 weeks to arrive.
If not received please contact HMRC to review Income Tax: general enquiries.
Thank you,