How to find my tax file number :Recover It in Minutes Here

Mar 15, 2024by Axel Hardy

Finding Your Tax File Number: A Step-by-Step Guide for ATO Australia

How to Find My Tax File Number might seem daunting at first, especially for those who are navigating the complexities of the Australian tax system for the first time or perhaps after a significant period. 

Whether starting a new job, opening a bank account, or filing taxes, your TFN is crucial to your financial and employment activities in Australia. Here's a straightforward guide to help you find your TFN and ensure your tax matters are in order.

Join us as we embark on this journey, ensuring that your quest to How to Find My Tax File Number is resolved swiftly and securely, transforming a potentially stressful endeavour into a hassle-free experience."

What is a Tax File Number (TFN)?

What is a TFN

A Tax File Number (TFN) is a unique identifier issued by the Australian Taxation Office (ATO) to individuals and organizations to manage tax and other government services. Here’s some data and history about TFNs in bullet points:

  • Introduction: The TFN system was introduced to improve tax administration in Australia. It makes it easier for the ATO to track individuals and entities for taxation purposes. The concept of a tax identification number has roots going back to World War II, but the modern TFN system, as it is known today, was more formally introduced in 1988.
  • Unique Identifier: Each TFN is a unique nine-digit number. No two individuals or entities have the same TFN.
  • Privacy: The TFN is considered sensitive personal information that is protected by strict privacy laws in Australia.
  • Unique Forever: Once issued, a TFN is unique to the individual or entity and remains the same for life, even if you change jobs, move overseas, or change your name. This permanency makes the TFN a lifelong identifier for tax and superannuation purposes.
  • Uses:
    • This is required for all individuals who wish to file a tax return, apply for Australian government benefits, request an Australian Business Number (ABN), or for other tax-related purposes.
    • Employers use the TFN to process payroll and superannuation contributions.
    • Financial institutions use TFNs to calculate the correct amount of tax on interest or dividends.
  • Application: Individuals can apply for a TFN at various stages of life, including when starting a new job, opening a bank account, or registering a business. Applications can be made online, by post, or through services like the Post Office.
  • History:
    • The TFN system has evolved to incorporate technological advancements, improving security and the efficiency of tax administration.
    • Initially, TFNs were used primarily for income tax purposes, but their use has expanded to include superannuation and government benefits.
  • Security Measures: The ATO emphasizes securing TFNs to prevent identity theft and fraud. Individuals are advised to share their TFN only with legitimate entities and for official purposes.
  • Compliance and Penalties: Misuse of a TFN or failure to provide one when required can lead to penalties and fines under Australian law.
  • International Comparisons: Many countries have similar systems to the TFN, such as the Social Security Number (SSN) in the United States or the National Insurance Number (NIN) in the United Kingdom. Each serves a similar purpose in tax and identity management but operates under different regulations and structures.

The TFN plays a crucial role in administering tax and superannuation systems in Australia, serving as a critical identifier for individuals and entities within the government’s financial and regulatory environment.

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Step-by-Step Guide on how to Find my tax file number

Step 1: Check Previous Documentation

Your TFN can be found on various documents, including:

  • Your income tax notice of assessment
  • Correspondence from the ATO
  • A payment summary or payslip from your employer
  • Your superannuation account statement

Step 2: Use the ATO Online Services

If you're unable to find your TFN on any documents, the next step is to use to find your tax file number on Mygov or ATO's online services:

  • MyGov: If you've linked your myGov account to the ATO, you can log in and find your TFN on the first page.
  • ATO app: Download and log into the ATO app using your myGov credentials. Your TFN will be visible under the 'My Profile' section.

Step 3: Call the ATO

If you still need help, you can contact the ATO directly by phone at 13 28 61. Be prepared to answer security questions to confirm your identity before they provide your TFN. The ATO's contact number is on its official website.

Step 4: Complete a TFN Inquiry Form

In some cases, if you can't use the above methods, you may need to fill out a TFN inquiry form available on the ATO website. This process requires identification documents and may take longer than the online or phone methods.

Protecting Your TFN

Remember, your TFN is sensitive information. Only share it with legitimate entities and avoid disclosing it unnecessarily, primarily online or over the phone, unless you're confident in the security of your communication.


Finding your TFN doesn't have to be a headache. Following these steps, you can quickly locate your number and complete your tax-related tasks. Keep your TFN secure and share it only when necessary to protect yourself against potential fraud.

Need help with more than just finding your TFN? The ATO website and myGov are valuable resources for various tax and superannuation inquiries.

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