We need to zero our YTD payroll data from AccountRight - Termination payment

If anyone can help us, please help.

We have outsourced our payroll and need to zero out all payroll data from MYOB AccountRight and send STP report so that we can report $0 payroll.

We went to each emloyee' card and zero out everything in the pay history. 

It worked for everything except for the ETP and ETP tax withheld.

It won't zero out. 

We don't want to reverse the original payroll if we don't need to as we would like to keep the record. 

Is there any other ways to make this zero? 

Thanks

Mina