You cannot modify existing sales lines directly on a terminal market order. Enter Anywhere Mobility Solutions changes through the Terminal Market Line Input page.
Steps
In the search box, enter Terminal Market Sales Orders, and then choose the related link.
Open the relevant terminal market order.
On the Lines FastTab, select the sales line you want to change, choose Actions, and then choose Change Line. The Terminal Market Line Input page appears.
Make Anywhere Mobility Solutions necessary changes in the fields.
Choose Yes.