You can make any changes necessary for existing Sales Orders. To call the form for edit of sale order click " Sales Orders" button on the main form. From the Sales Orders List form, you have to choose the Sales Order and click on the "Edit" button( or double click on the Order row). You can change, add and remove Sale Order information using any functions of the New Sales Order form . We don't recommend you to make any changes in the Sales Order after it has been sent to your customer. You can prepare another Sales Order for the required adjustment.