It's your responsibility to maintain your Australian business number (ABN) details. You must update your details within 28 days of becoming aware of changes.
Once you are registered, your ABN details become part of the ABR.
It's important your details are up-to-date so that other businesses can access and verify your information, for example, that you are operating a business or the status of your GST registration.
Your ABN details are also used by a range of government agencies to plan for community services and infrastructure development that can benefit business.
The fastest way to update your details is online using an AUSkey or Manage ABN Connections. All changes made to your ABN online will take effect immediately.
Alternatively you can contact us or lodge a form by mail.
Check the ABR Dashboard for current information about ABR performance.