The PO can be in 2 different places. The PO number for the GFS customer ( Level 1)can be stored in GFS on the Bill To option tab of the customer record in GFS. The PO number for Level 2 Level 3 accounts needs to be stored in Request DMS, and loaded as part of the billing file.
You will need to add the PO number as part of the file being loaded to GFS. See attached sample where the PO number needs to be IF the Level 2 Level 3 has a PO number. If they do not have a PO number, leave it blank in the file
Send me a sample file to load into GFS that’s has PO’s, and we will work on printing it in the correct place on your invoice