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