When you post a sales order, the program creates a sales shipment that can be seen in the Posted Sales Shipment window.
The sales shipment was created when you clicked the Posting button on a sales order and then chose: Post, Ship; Post, Ship and Invoice; Post and Print, Ship or Post and Print, Ship and Invoice.
If there is a check mark in the Shipment on Invoice check box in the Sales & Receivables Setup window, a shipment will also be created when you post an invoice.
A sales shipment consists of a sales shipment header and one or more sales shipment lines.
The sales shipment header contains all the relevant information about the sell-to and bill-to customers such as name, address, document number and date. The program copied the information from the sales header when it was posted.
Sales shipment lines contain information (such as item number, quantity and prices) copied from the posted sales line.
You cannot change any of the fields on a sales shipment header or lines because the shipment has already been posted.