Register online as a ‘trusted helper’ to help a friend or relative:
- check they are 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 are helping must then use the service to accept your registration. If they cannot 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 are helping:
- first and last name
- National Insurance number
- date of birth
This service uses GOV.UK Verify. If you have not used GOV.UK Verify before, it takes about 15 minutes to get set up.
Call HMRC on Someone Else’s Behalf
If the person you are helping cannot 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 are helping. HMRC will confirm their identity and check that they are 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 are helping has a disability.
Further information on helping friends or family with their tax can be found on GOV.UK's website.