La reponse serait qu'elle n'a pas besoin de demander un nouveau TFN. Celui-ci te suit a vie
"Tax file numbers - individuals
Printable version
This guide explains how to apply for, or enquire about, your tax file number (TFN).
Note
Tax file numbers – individuals (NAT 1753) is also available as a complete product:
as a downloadable pdf version, or
paper product.
What is a tax file number (TFN)?
A tax file number (TFN) is a unique number issued by the Tax Office.
Only one TFN is issued to you for your lifetime. Once you have been issued with a TFN, there is no need to apply for another if your circumstances change – for example, if you:
- move interstate
- change jobs
- change your name in any way
- acquire investments, or
- claim government benefits.
However, you should advise us of any change to your name or address."
http://www.ato.gov.au/individuals/conte ... 1&st=&cy=1
Et pour ce qui te concerne tu peux demander ton TFN en ligne via le site de l'ATO :
http://www.ato.gov.au/individuals/conte ... 1&st=&cy=1