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.
0300 200 3410
+44 151 268 0571
03000 543 889
8am to 6pm, Monday to Friday
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
If you’re replying to a letter you’ve received about your Corporation Tax, you should use the address on that letter.