When doing a serial number removal for a file that goes from Partner to clients pays. does the payroll in the old serial number need to be finalised or just entering the old BMS into the new file enough to stop the ATO getting a double report ? I have had conflicting advice- one said no just have your old BMS and enter that when setting up payroll in the new serial number - Two said you must also finalise reconile the payroll and finalise in the old file before sending for the serial number removal ? any advice to correct procedure. Thanks