Please note: 

W1 gross wages lodged in BAS DO NOT include salary sacrifice. 

on MYOB payroll activity summary report: 

W1 lodged in BAS = gross wages MINUS deductions (salary sacrifice)

because when we record salary sacrifice in MYOB: we use MYOB default setting, unless TT and client request to have salary sacrifice presented in a separated line from the wages & salary expenses.

Dr wages & salary, Cr salary sacrifice payable.