If HMRC needs to contact you about anything confidential they’ll reply by phone or post.
Online help and support
You can also watch videos and join webinars for help with Self Assessment.
You can use Twitter to get general help from HMRC. We can’t discuss specific cases or an individual’s tax affairs, so please don’t give any personal details.
Start your tweet with @HMRCcustomers
8am to 10pm, Monday to Saturday
9am to 10pm Sunday
Webchat is unavailable at the moment because of technical problems.
Call HMRC for advice on Self Assessment.
If you have a National Insurance number and Self Assessment Unique Taxpayer Reference (UTR) have them with you when you phone.
0300 200 3310
0300 200 3319
+44 161 931 9070
8am to 8pm, Monday to Friday
8am to 4pm Saturday
9am to 5pm Sunday
Closed bank holidays, Easter Sunday, Christmas Day, Boxing Day and New Year’s Day.
Contact Self Assessment: online services for problems filing your tax return online or if you’ve lost your online service user name or password.
Write to HMRC at this address with all Self Assessment queries except complaints.
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.
HM Revenue and Customs