This is not highly recommended as all additional should really start in the Bill of Materials and Processed through to the rest of the modules. There may be exceptions such as a Credit Card Fee that you would want to show up as a line item on the Customer Invoice. To create a new line without having to go back to the BOM and re-processing the order you can directly enter the line into the Order Entry Module by following the below steps:
Select "Create / Edit Line Item(s)"
Select "New"
Fill in your Qty, Part #, Description, UOM, Product Type, Vendor and Price Each. Be sure to adjust the commissionable income / non-commissionable income if necessary and Save.
