Register online as a ‘trusted helper’ to help a friend or relative:

  • check they’re paying the right amount of Income Tax
  • check or update their personal tax account
  • claim a tax refund
  • check or update their company car tax

The person you’re helping must then use the service to accept your registration. If they can’t go online, you may be able to call HM Revenue and Customs (HMRC) on their behalf.

You can be a trusted helper for up to 5 people.

The person you’re helping will still be legally responsible for their own tax.

You’ll need the following details for you and the person you’re helping:

  • first and last name
  • National Insurance number
  • date of birth

You’ll also need an account with GOV.UK Verify - you can sign up in 15 minutes.

Start now

on GOV.UK Verify

Call HMRC on someone else’s behalf

If the person you’re helping can’t go online, you can call HMRC on their behalf and talk to them about any tax issue.

You must be in the same room as the person you’re helping. HMRC will confirm their identity and check that they’re happy for you to represent them.

You must have their National Insurance number or tax reference number when you call.

You must be over 16 if you’re interpreting for a non-English speaker. HMRC’s helplines also have foreign language services.

Read guidance on HMRC services if you or the person you’re helping has a disability.