GOV.UK
Self Assessment: general enquiries
Online
Register for and file your Self Assessment tax return
Get your SA302 tax calculation
Tell HMRC you've changed name or address
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 cannot discuss specific cases or an individual’s tax affairs, so please do not give any personal details.
Start your tweet with @HMRCcustomers
Opening times:
Monday to Saturday: 8am to 10pm
Sunday: 9am to 10pm
Webchat
Advisers can only talk to you about Self Assessment or PAYE Income Tax. They will not be able to transfer you to another webchat team.
Webchat is unavailable at the moment because of technical problems.
Phone
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.
Telephone:
0300 200 3310
Textphone:
0300 200 3319
Outside UK:
+44 161 931 9070
Opening times:
Monday to Friday: 8am to 8pm
Saturday: 8am to 4pm
Sunday: 9am to 5pm
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.
HMRC may ask if you want to add voice identification to your account. You can find out more in the Voice Identification Privacy Notice.
Post
Write to HMRC at this address with all Self Assessment queries except complaints.
You do not need to include a street name, city name or PO box when writing to this address.
Couriers should use a different address.
Self Assessment
HM Revenue and Customs
BX9 1AS
United Kingdom