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Australian Business Register (ABR)

ABN registration for government
Government organisations must use the ABR's Application for ABN registration for government organisations.
If you’re in business you should get an Australian business number (ABN). You may also need to register for certain tax obligations and entitlements. We use registration to manage the tax and superannuation systems fairly for all businesses and their employees.
Update your details
You're required by law to tell us within 28 days when your business details change, such as address or associates.