Inventory not showing up in Sales Invoice or Supplier Invoice


I have some inventory on hand now. I want to start my accounting starting 1 July 2016.
When I want to try to make a sales/supplier invoice, the code of inventory is not showing. What is the problem here? I am using the latest desktop version.


Need to select Inventory - sales Account then the SKU column will appear.

Under Account you need to click the grey Suspense, this will display COA’s - select Inventory - Sales and a new field will be displayed - Inventory Item, then select code