Create the departments for the whole company.
If a department is no longer exist (obsoleted). You can uncheck the Active check-box to make it inactive.
If Reference is inputted, the GL Voucher generated by Generate GL Voucher will be grouped not only Account, Sub-Account from Payroll Cost Centre but also Account, Sub-Account from Payroll Cost Centre , Department Reference from Department.
The Members tab is for information only, it shows the members of this Department