Resolution
- From the invoice screen double-click on an empty line on Item Number column.
- On Select Inventory/Service window you click on Create on the lower left side.
- On Inventory & Services Ledger type in an Item Number and Description. Make sure Service is selected as Type on the right side.
- You can setup a unit of measure under Units tab, a unit price under Pricing tab and Revenue and Expense accounts under Linked tab. Fill in other tabs as needed, when done click on Save and Close.
- You should be back to Sales invoice window with a line that show the newly created service item.