When should I be taxed

I have an income over £100k . My understanding is that for 22/23 tax year for every £2 about 100k you lose £1 of personal allowance. My personal allowance as confirmed by HMRC is £2248 However, when calculating how much tax they owe me they have done their sums starting with NO personal allowance which means taxed 20% up to 37700 and 40% on anything above that. Is this correct?

Hi Laura.doyle3,
You are correct on how the rates would work.
When you complete the Self Assessment and enter all your income and benefits it will calculate how much Personal Allowance you are due at that point.
Thank you.