You should cancel your ABN when your business:
You may also need to cancel your ABN if your business structure has changed.
If your business operation has ceased you must update your details or cancel your ABN within 28 days.
The fastest way to cancel your ABN is online using AUSkey, or to talk to your taxation professional who can do this on your behalf.
Cancelling your ABN will:
To cancel you can also contact us or lodge a form by mail.