Check out the comprehensive guide below for adding and managing your inventory in QuickBooks Online.
Only QuickBooks Online Plus supports inventory tracking and pricing. If you want to track inventory, you'll need the PLUS subscription.
On the left navigation menu, click on "Sales" or "Invoicing" and "Products and Services. Then click on "New" and select "Inventory."
For QuickBooks Online Simple Start and Essentials, you'll have to use a Non-inventory item for all of your Amazon SKUs.