The amount of fringe benefits supplied to employees, grossed up by 1.8868, are reported to the ATO via STP. This process needs to be completed after 31 March and before the pay is finalised in June. For employees that leave early you can also make sure their details are updated and reported to the ATO in a timely manner.
For detailed instructions navigate to our Knowledge Base Article, Update Fringe Benefit Balances & Check Payment Summary.