About Tax File Numbers

What is a Tax File Number?

A Tax File Number (TFN) connects you to the Australian tax and superannuation system. It’s basically your “member number” at the ATO. ATO stands for "Australian Taxation Office".

Once you have a TFN, it’s yours for life - so, it’s important to keep this safe. You can apply well before you start your first job. You can apply for a TFN at any age.

Why do you need one?

Your boss pays your tax on your behalf. It is important that they have your TFN, so when you lodge your tax return, your tax has been correctly attributed to you. Also, without a TFN, the ATO will charge you more tax.

How do you apply?

1. Online
   You need to be over 15 and have a passport for this method.
2. Via Australia Post
   Complete an online form first and then book an appointment at an Australia Post outlet. Bring your forms and original identity documents.
3. Via mail
   Complete an online form first, then get copies of your identity documents certified (never send in your original documents) and follow the mailing directions on the pack.
4. Via Centrelink (Services Australia) centre
   If you are current Centrelink customer, complete an online form. Then bring your completed forms and original identity documents to your local Centrelink centre.