The Termination Reason field in the Termination Details screen of the Payroll module is a free text form which means the termination reason can be entered directly from the Payroll Termination screen.
The user can enter any reason, even though there is a drop down button available. The drop down list is available for the user to be able to see termination reasons you have used in the past.
Normally, reasons for all the modules are added from Customers > Configuration > Reasons.
The ATO advises that it can take up to 72hrs for a response when an STP file has been submitted. We have found that normally successful responses are sent fairly quickly but errors normally take longer. If you have still not received a response after 72hrs, we suggest contacting Ozedi (or the company you use to transfer the file to the ATO) to ensure there aren’t any issues with their platform who may then refer you to ATO.