A nine digit number issued to you by the Tax Office.
A password you created during registration.

Enter the code displayed in the image above.


Collecting your tax file number
The ATO is authorised by the Taxation Administration Act 1953 to ask for your tax file number. It is not an offence not to provide your TFN. However, you will not be able to use these services if you do not provide your TFN as the ATO needs it for authentication purposes.

When you authenticate online with the ATO, we request that you provide particular personal information such as your name and date of birth. We will also request particular tax information only known to you, the ATO and the institution which provided the information to both you and the ATO.

Certain information about your computer, your browser and the authentication process will also be logged by the ATO when you authenticate online such as:

  • Your internet provider number (IP address),
  • The date and time of the use of the authentication service,
  • The authentication information you provided,
  • Successful and unsuccessful attempts at authenticating.

The ATO may use this information to:

  • Confirm your identity,
  • Compile statistics and reports to enhance ATO systems and services,
  • Identify and respond to issues that may indicate authentication integrity is at risk,
  • Detect, investigate and prosecute criminal offences.

We do not share this information with other government agencies or other organisations without your permission unless that is required or authorised by law.

Terms and conditions you must agree with to access this service.

First time user or forgotten your password?


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Protect your secure login
Your secure login is an important security measure when dealing with us online. Never disclose your tax file number or password to anyone.

Forgotten your password?
To reset your password, you need to complete the registration process again.

Need help? 
Answers to common questions about logging in.

System maintenance and issues
The system may be unavailable due to system maintenance or issues.

Register for a secure login
To register, you’ll need to provide information from some personal documents to prove your identity. Your notice of assessment is a good place to start.