Click the Menu icon, click Monitor, and then click Repair Orders.
On the Repair Orders page, fins the appropriate repair order, and then in the Stock# / RO# / PO# / Invoice column, click the current PO number if any, and enter the PO number that you want.
You can also add or edit PO number in repair order detail view.
On the Repair Order detail view, in the Repair Order Details section, click the current PO number if any, and then enter the PO number that you want.