How can I find and change my tax code?
To find your tax code, look:
- on a “Tax Code Notice” letter from HMRC if you get one
- on your payslip (this might be online or in paper form)
- on the HMRC app
- by checking your tax code for the current year online on your personal tax account
Use the government website to notify HMRC of any income changes that probably affected your tax code.
If you paid too much or too little tax, HMRC will send you either a calculation letter known as P800 or a Simple Assessment letter.
The letters will then indicate how to proceed.
If you think the calculation on the letter is wrong, you should call or write to HMRC within 60 days.
You can call on 0300 200 3300 or send a letter to Pay As You Earn and Self Assessment, HM Revenue and Customs, BX9 1AS, United Kingdom.
