Then, close out the unpaid invoice by going to the Receive Payments screen. If you're using QuickBooks Desktop (QBDT), let's add an expense account to track the bad debt. You can also run any inventory reports to help you get real-time inventory status in the program. For the value of your finished goods, you can edit it by going to the Products and Services list. For your reference, check out this article: Adjusting Inventory Quantity On Hand.
QBO will automatically record appropriate adjustments to your Inventory Asset and Cost of Goods Sold under Inventory Shrinkage accounts. Complete the details of the transaction.