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.
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.
The following can't be updated:
Name changes made by the ATO and ASIC will update the ABR.
If you're unable to update details using the above link, contact us or lodge a form by mail.