Understanding Sales Order Defaults
Many of the fields on the order entry form and schedule pages are automatically populated from the sold to customer, order group, or sales buying agreement that you select.
If any fields change that control data in additional fields, the default values could change, too. For example, if you change the ship-to customer on the order line so that it differs from the order header, then the system performs the same default processing as for the ship-to customer in the order header. The same processing occurs for the schedule. In another example, if you change the buying agreement on the order line, the system automatically populates the order line values the same way that it does on the order header for values that are controlled by the buying agreement.
The fields that control data in additional fields on the line are:
Buying agreement line
Ship to customer
Order Management business unit
The ship-to customer ID field controls data in additional fields on the schedule.