This rejection error will occur when an income type has been included in a pay for an employee where the income type has the option ticked for Show as CDEP Earnings. This setting is no longer used by the ATO and can be turned off on the Income type.
To resolve the error:
In the Single Touch Payroll batch with the error, In the Employees list at the bottom of the screen find and note down the employee code with the error.
In Attaché Payroll, find the employees pay that correlates with the STP batch by going to Payroll, Transactions, Timesheets, Lookup.
Enter the Employee Code then in the Pay Number field, click the magnifying glass icon and search for the most recent pay for the employee.
View the pay and note down the income type codes that were included in the pay.
Again, in Attaché Payroll, go to Setups, Payroll, Income Types, Maintain.
Select the Income Type Code for the noted codes from the pay and locate the code that has the Show as CDEP Earnings checkbox ticked.
Un-tick the box, and then click Accept (F9) to save the change.
Go back to Single Touch Payroll. In the erroring STP batch, click the Refresh button at the top-right of the screen, and in the next screen click the Run Update button. Let the refresh complete.
The batch should then change back to Ready to Submit status.
Sign and submit the batch again, and it should then come back as ATO Confirmed status.