To perform a WIP transfer to an open Prebill:
Double-click on the Edit Prebills icon in the right pane.
The Billing\Edit Prebills window opens.
Click on the Prebill # of the prebill you want to open.
Select Form > Open from the menu, to view the Prebill.
The prebill opens in a window.
Right-click on the line item you want to transfer and select WIP Transferfrom the menu that appears.
A Transfer To window opens.
Click OK.
A WIP Transfer General Warning window opens.
Click Yes to continue.
You are asked if you want to add the entry (or entries) to the exisitng prebill.
Click Yes, to add the entry to the existing Prebill.
The line item is removed from the prebill.