Best way to convert non inventory to invetory in QBO

Thank you for reaching out to us, Hassan381.

Currently, the process of changing a non-inventory item to inventory is still done manually. The reason behind this is to make sure the item details are entered accurately.

You can find more information about inventory items in this article: How to Change Product and Service Types.

I'll be right here if you have any additional questions about QuickBooks. Have a great day!​​​

Do not change non inventory to inventory even though QB allows it

doing so will change the financial history of the file from the start date - that may or may not matter to you, but there is no way for us to know how that affects your financials.

create new inventory items, order and stock them using the item details part of a PO and Bill.

then you can make the non inventory items inactive to get them off some lists