Your Tax File Number (TFN) is a unique 9-digit number issued by the Australian Taxation Office (ATO) that is essential for all taxpayers. It is used to track your tax and superannuation information. Losing or forgetting your TFN can be worrisome, but fear not! In this complete guide, we will show you how to find your Tax File Number online easily and securely.


1. Retrieve Your TFN Through myGov

The most straightforward and secure way to find your TFN online is through the myGov portal. If you don’t already have a myGov account, you can create one by visiting the myGov website and following the registration process. Once you have access to your myGov account, follow these steps:

  1. Log in to your myGov account using your username and password.
  2. After logging in, you will see a list of linked services. Look for the “Australian Taxation Office” and select it.
  3. You may be prompted to enter some additional details for verification purposes.
  4. Once verified, you will have access to your ATO online services, including your Tax File Number.


2. Find Your TFN Through ATO Online Services

If you prefer to access your TFN directly through the ATO website without using myGov, follow these steps:

  1. Visit the ATO website ( using a secure internet browser.
  2. Look for the “Access myGov” or “Login” button on the homepage and click on it.
  3. If you already have a myGov account, log in using your credentials. If not, you will need to create an account first.
  4. Once logged in, navigate to the “Personal Details” or “Profile” section, where you should find your Tax File Number.


3. Retrieve TFN via Phone or Mail

If you prefer not to use online services or encounter issues with myGov or the ATO website, you can also retrieve your TFN by contacting the Australian Taxation Office directly.

  1. Phone: You can call the ATO on 13 28 61 and request your Tax File Number. You will need to answer some security questions for verification purposes.
  2. Mail: You can complete and submit a “Tax file number – application or enquiry for individuals” form (NAT 1432) to the ATO. This form is available for download on the ATO website. Once processed, the ATO will mail your TFN to your registered address.


Frequently Asked Questions (FAQs)

FAQ 1: Is it safe to find my TFN online?

Yes, using the myGov portal or the ATO website to retrieve your TFN is safe and secure. Ensure that you log in from a trusted device and keep your login credentials confidential.

FAQ 2: Can I retrieve my TFN without myGov or online access?

Yes, you can request your TFN through the ATO’s phone service or by submitting a form via mail.

FAQ 3: What documents do I need to find my TFN online?

To find your TFN online, you generally need your myGov login credentials or the relevant identification details for phone verification.

FAQ 4: Can I get a replacement TFN if I lost my original one?

No, the ATO does not issue replacement TFNs. If you lost your TFN, you can retrieve it using the methods mentioned in this guide.

FAQ 5: Can I use my TFN for other purposes?

Your TFN is primarily used for tax and superannuation purposes. Avoid sharing it with anyone unless required by authorized entities.

FAQ 6: Is it free to retrieve my TFN?

Yes, retrieving your TFN through official channels like myGov, ATO website, phone, or mail is free of charge.



Finding your Tax File Number online is a straightforward process that ensures you can access important tax and superannuation services. Remember to use secure online methods like myGov or the ATO website to safeguard your personal information. If you face any difficulties, you can always reach out to the ATO through their phone service or mail. Keep your TFN confidential and use it solely for its intended purposes to protect your identity and financial security.





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