Call HMRC about Self Assessment and PAYE if you’re formally authorised to act as an agent or tax adviser for your client.
0300 200 3311
Our phone line opening hours are temporarily changing to:
Monday to Friday: 8am to 4pm
This is due to having fewer advisers available to answer calls because of the measures put in place to stop the spread of coronavirus.
You can also find out information in:
Write to HMRC if you’re formally authorised to act on behalf of your client.
You do not need to include a street name or PO box.
Couriers should use a different address.
HM Revenue and Customs
Pay As You Earn and Self Assessment