Let me help you in setting this up, Marlon-Landicho. Recording of an inventory item is done through the Products and Services section in QuickBooks Online. Here's how:Click Sales on the left pane.Select Product and Services.Click New, then select Inventory.Enter the inventory item information, then click Save and close.When you create a purchase order, it doesn't affect your inventory since it's a non-posting transaction. Check out these articles for more information:Set up and create projects in QuickBooks OnlineCreate purchase orders in QuickBooks OnlineI'll be right here if you have more questions.