Tax file number

How to apply for a tax file number (TFN), update your TFN details, where to find your TFN and what to do if it's stolen.

What is a tax file number?
Find out what you need a TFN for and how to keep your TFN and personals details safe.

Apply for a TFN
How to apply for a TFN online or by paper depending on your circumstances and residency status. It is free to apply.

Lost or stolen TFN
How to find your TFN if it's lost and what to do if your TFN is stolen or being misused.

Update your TFN registration details
How to update your TFN details, such as your name, date of birth or bank details if they are incorrect or have changed.

Identity documents
The identity documents you need to apply for a TFN, ABN or register for GST and who can certify your original documents.