If you want to create the product/part codes directly from the POS, there are couple of things to bear in mind:
From the main menu: Configuration / General information Tick the option 12 Save
Open the POS to prepare an estimate for a client:
After entering all the information, GEM-CAR will ask you if you want to add this item into permanent inventory if you want to use it later (click YES) or if this is for a single use only (click NO).