Self Assessment: general enquiries

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Online forms

If HMRC needs to contact you about anything confidential they’ll reply by phone or post.


  • Telephone: 0300 200 3310
  • Textphone: 0300 200 3319
  • Outside UK: +44 161 931 9070

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.

Find out about call charges

Opening times:

8am to 8pm, Monday to Friday
8am to 4pm Saturday

Closed Sundays, 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 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
United Kingdom

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Don’t include personal or financial information, eg your National Insurance number or credit card details.