GOV.UK
IR35
Email HMRC for help with IR35 enquiries.
ir35@hmrc.gov.uk
HMRC will only email you with confidential information if you have given them your written agreement they can do so.
Phone
Call HMRC for help with IR35 enquiries.
Telephone:
0300 123 2326
Fax:
03000 533 124
Opening times:
Monday to Friday: 8:30am to 4:30pm
Closed weekends and bank holidays.
Post
Write to HMRC for help with IR35 enquiries.
HM Revenue and Customs
IR35 Customer Service Unit
S0733
Newcastle Upon Tyne
NE98 1ZZ
United Kingdom