Tax File Number (TFN)

If you want to file the annual tax returns electronically, apply for Australian business number (ABN), or benefit from government services, you must apply for your unique lifelong tax file number (TFN).

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Australian Business Number (ABN)

Australian Business Number (ABN) is an 11-digit number which is uniquely issued for every applicant by the Australian Business Register (ABR), the business registration body which works under the supervision and control of the Australian Taxation Office (ATO).

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How to protect your business

Identity thieves can take your business details by: • Breaking into your business and stealing your records • Taking a photo of your business or employee details • Stealing your passwords, account logins and AUSkey • Obtaining access to your data through legitimate means (eg as an employee).

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