Below are the ways you can update your name with the ATO:
The quickest way to update your name is by using the ATO myGov account linked to the ATO.
You will need at least one of the following identity documents to make the change:
Australian full birth certificate – not an extract
Australian marriage certificate
Australian change of name certificate.
The ATO can update your name over the phone if you have the right documents to make the change. Just call them to speak to a customer services representative (13 28 61).
You will need at least one of the following identity documents that can be checked over the phone: