How to correct a mistake or make an amendment on a tax return, how to claim a tax refund or correct an underpayment or overpayment
Telephone
Self Assessment Helpline
Help and advice for customers completing their tax return and supplementary pages, or who need general advice about Self Assessment Please have your Unique Taxpayer Reference number with you when you phone
Opening hours
8.00 am to 8.00 pm, Monday to Friday 8.00 am to 4.00 pm Saturday Closed Sundays, Christmas Day, Boxing Day and New Year's Day
0845 900 0444
For customers who are deaf or hearing or speech impaired:
0845 302 1408 (Textphone)
A textphone allows you to type what you want to say rather than speaking into a mouthpiece. You can use a textphone instead of a voice telephone if you are deaf or have problems with your speech. It is not possible to speak to an adviser by phoning a textphone number.
If you're calling from abroad please telephone:
+44 161 931 9070
Post
You can write to HMRC by using the postal address on the most recent correspondence from us.
If you don't have recent correspondence from us then write to:
If you want to complain to HMRC about the service you have received in relation to Self Assessment, please clearly mark your letter as a complaint so we can direct it to a complaints handler quickly.
