Hello @esrperf2020,

Let me share additional information about how a sale of inventory assemble affects the quantity on hand of your items.

Since the inventory assemble has its own quantity, it will deduct with its quantity, not on the items created with the assembly. With this, you can consider manually deducting the quantity of the items under the assembly after making a sale.

But please be informed that we do not recommend utilizing this method to avoid confusion once you review your reports for accounting reasons. To add, you can read more about assemblies with the articles shared by my colleague above.

Lastly, I've got you this helpful reference for a compilation of articles you can use while working with your inventory: Manage Inventory in QuickBooks Desktop.

If you have any other questions, please let us know by leaving any comments below. Stay safe and well!