How do I change the pay status of payroll withholding vouchers from A "approved" to H "held".

How do I change the pay status of payroll withholding vouchers from A "approved" to H "held" when it's transferred from the payroll system to the accounts payable system? Sometimes payroll withholding vouchers are paid before we intended because we fail to change the pay status back to H, or payroll has finished processing just as AP is processing payments but has not been notified of payroll's completion.  I have looked all over and cannot find it.