I am paying 8.7 times of Income Tax when my tax code was changed from 1257L to 1267L!!!

I applied https://www.gov.uk/tax-relief-for-employees/working-at-home since I will be a remote staff soon. Unfortunately I found that from my curreny payslip in Nov 2023 I am paying 8.7 times of Income Tax comparing to Oct 2023 when my tax code was changed from 1257L to 1267L!!! So why did this happen? What is the tax allowance for 1267L? Should I change my tax code back to 1257L? Please reply ASAP as I am too panic for this thanks.

Hi,

The code 1257L means you can earn £12570 before tax is due and for the code 1267L you can earn £12670 before tax is due. The change in code should not cause a large change in the tax due. 

You will need to contact our Income Tax team for us to access your record and check this for you.

Income Tax: general enquiries

Thank you.