Hi Wayne Henley,
If you have an online account
Personal tax account: sign in or set up you can view the code for 2024/25 to check this.
If unable to view online you will need to
contact HMRC to review the code.
If your income returns to previous levels for 2024/25 then the code would go back to what is expected unless there is an underpayment being collected.
Thank you.