The ATO is reviewing Australian business numbers ('ABNs') to identify potentially inactive ABNs for cancellation, and it has introduced a new automated process to allow taxpayers (or their tax agents) to confirm if their ABN is still required via a secure voice response system.

An ABN may be selected if the taxpayer has not reported business activity in their tax return, or there are no signs of business activity in other lodgments or third-party information.

The ATO reminds taxpayers that any income earned under an ABN needs to be reported in their tax return, regardless of the amount.  By keeping their tax obligations up to date, the ATO can see they are actively undertaking a business (so, therefore, their ABN should not be cancelled).