Corporation Tax: general enquiries


Pay your Corporation Tax bill

Find out ways to pay your Corporation Tax bill. If you’re having problems paying due to coronavirus (COVID-19), contact our helpline.

Check when you can expect a reply from HMRC

Find out when you can expect to receive a reply from HMRC to a query or request you’ve made.

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

Ask HMRC online

Ask HMRC’s digital assistant to get a quick answer to your query about:

  • accounting periods
  • changing any business details
  • Corporation Tax repayments
  • paying Corporation Tax


Call HMRC for help with general Corporation Tax enquiries.

You’ll need your 10 digit Unique Tax Reference (UTR) that will be on all letters from HMRC and HMRC online services.

Our advisers cannot give you this reference over the phone.

You can ask for a copy of your Corporation Tax UTR if you do not know it.

If you are a large business, contact your Customer Compliance Manager.

0300 200 3410

Outside UK:
+44 151 268 0571

Opening times:

Our phone line opening hours are:

Monday to Friday: 8am to 6pm

Closed weekends and bank holidays.

You can also find out information in:

Best time to call:

Phone lines are less busy between 8.30am and 11am.

Find out about call charges


Write to HMRC for help with general Corporation Tax enquiries.

If you have a Unique Tax Reference include it in your letter and on the first page of any documents you send.

You do not need to include a street name, city name or PO box when writing to this address.

Couriers should use a different address.

Corporation Tax Services
HM Revenue and Customs
United Kingdom

If you’re replying to a letter you’ve received about your Corporation Tax, you should use the address on that letter.