Linking to the Products / Items Register in Invoices
Adding an invoice that is needed to be linked to the Product / Items Register
Step 1. Ensure that you have chosen to Update Products / Items as 'From Invoices':
Click on the Setup > Settings menu option.
Click on the Transactions tab.
Select 'From Invoices' for the Update Products / Items box.
Step 2. Add a new invoice using the relevant Account Code that is linked to the Products / Items Register
Step 3. In the Item Code or the Detail column
Click on the down-arrow to access the Product / Item you wish to use.

Note: That product transactions will be added automatically if relevant
Article ID 804