Corporation Tax: general enquiries

Phone

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.

Telephone:
0300 200 3410

Outside UK:
+44 151 268 0571

Fax:
03000 543 889

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.

Find out about call charges

Post

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
BX9 1AX
United Kingdom

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