Income Tax: general enquiries


Tell HMRC about changes that could affect your tax code

This service is part of the personal tax account, and you can use it to check:

  • your tax code
  • the information HMRC holds about your employment
  • an estimate of how much tax you’ll pay

Tell HMRC you've changed name or address

Use HMRC’s automated assistant Ask Ruth

If HMRC needs to contact you about anything confidential they’ll reply by phone or post.


You can use Twitter to get general help from HMRC. We can’t discuss specific cases or an individual’s tax affairs, so please don’t give any personal details.

Start your tweet with @HMRCcustomers

Opening times:

Monday to Saturday: 8am to 10pm
Sunday: 9am to 10pm


Advisers can only talk to you about PAYE Income Tax. They will not be able to transfer you to another webchat team.

Webchat is unavailable at the moment because of technical problems.


Income Tax

Call HMRC for help with questions about Income Tax and Class 4 National Insurance, including issues with:

  • your tax code
  • tax overpayments or underpayments
  • P800 tax calculations

You can also get help with identification and verification problems if you’re trying to register for a personal tax account.

Have your National Insurance number with you when you phone.

0300 200 3300

Outside UK:
+44 135 535 9022

Opening times:

Monday to Friday: 8am to 8pm
Saturday: 8am to 4pm

Closed Sunday and bank holidays.

Best time to call:

Phone lines are less busy before 10am, Monday to Friday.

HMRC may ask if you want to add voice identification to your account. You can find out more in the Voice Identification Privacy Notice.

Marriage Allowance

Call HMRC to:

  • make a backdated claim for Marriage Allowance if your spouse or civil partner has died
  • apply for Marriage Allowance if you do not have a National Insurance number, because you do not intend to work or study in the UK

0300 200 3300

Opening times:

Monday to Friday: 8am to 8pm
Saturday: 8am to 4pm

Closed Sundays and bank holidays.

You can use NGT text relay if you cannot hear or speak on the phone: dial 18001 then 0300 200 3100.

Find out about call charges


Write to HMRC at this address for all Income Tax queries except complaints.

You don’t need to include a street name, city name or PO box when writing to this address.

Couriers should use a different address.

Pay As You Earn and Self Assessment
HM Revenue and Customs
United Kingdom