It is a legal requirement in the regulations from the ATO that Single touch payroll data must be reported on or before the day you withhold from a payment (the pay day).
Pay run data should be sent after a pay run is fully completed and applied. It is important that you ensure the accuracy of each pay run before sending data to the ATO as resubmitting is only allowed if you have not submitted any subsequent data.
Payment data should be submitted after entering a payment for a supplier where a voluntary withholding amount has been specified.
Employee data should be sent to the ATO when changes or fixes have been made to the employee data that don’t include a payment to the employee (such as reassigning pay item payment summary positions). Employee data should also be sent when finalising employee data for the financial year.
Supplier data should be sent to the ATO when changes or fixes have been made to the supplier data that don’t include a payment to the supplier. Supplier data should also be sent when finalising supplier data for the financial year.
When you have completed payroll activity for an employee or supplier, either after termination or at the end of the financial year, a finalisation event should be sent via the STP Finalisation and Lodgment form (Payroll > End of year > STP finalisation and lodgment) or Supplier forms. This alerts the ATO that all data for the year is final and correct.