Corporation Tax: general enquiries

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  • Telephone: 0300 200 3410
  • Outside UK: +44 151 268 0571
  • Fax: 03000 543 889

Call HMRC for help with general Corporation Tax enquiries.

You’ll need your 10-digit Unique Tax Reference when you call. You can find this on letters from HMRC and in your online services account.

Find out about call charges

Opening times:

8am to 6pm, Monday to Friday

Closed weekends

Best time to call:

Phone lines may be less busy between 8am to 9am and 5pm to 6pm.


Write to HMRC for help with general Corporation Tax enquiries.

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.

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.

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Don’t include personal or financial information like your National Insurance number or credit card details.