Self Assessment: general enquiries
Contact HMRC for advice on Self Assessment and to change your personal details.
Online
You can ask our digital assistant for help with:
- registering for Self Assessment
- ending Self Assessment
- filing your tax return and paying your bill
- appealing a penalty
- requesting a refund
- activation codes
If the digital assistant cannot help you, you can ask to transfer to a webchat with an HMRC adviser if they’re available.
Find guidance on Self Assessment tax returns
If you’ve already contacted HMRC, you can check when you can expect a reply.
X (previously known as Twitter)
You can use X to ask HMRC questions. We cannot discuss specific cases or individual tax affairs, so do not give any personal details.
Start your post with @HMRCcustomers
Opening times:
- Monday to Friday: 8am to 8pm
- Saturday: 8am to 4pm
Phone
Contact Self Assessment general enquiries
Call HMRC if you have a query about your Self Assessment returns, payments, replacements or notices.
Telephone: 0300 200 3310
Outside UK: +44 161 931 9070
Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays.
Contact online technical support for Self Assessment
Contact HMRC’s online services helpdesk if you:
- are having problems submitting your return online
- have lost your online service username or password
- get any error messages in your online account or on a form
Post
You can write to HMRC if you have a Self Assessment query.
Self Assessment
HM Revenue and Customs
BX9 1AS
United Kingdom
Find out where to send letters if you’re not using Royal Mail.
There is a different way to:
Related content
Guidance
HMRC contacts
Updates to this page
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To provide Self Assessment support on Saturday 31 January, our webchat will be open from 8am to 4pm and our phone helpline will be open from 9am to 4pm.
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Phone line opening times over Christmas and New Year have been added.
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First published.