You can only merge items of the same type. Duplicate service item types can be merged together, but a service type item cannot be merged with a non-inventory item type.When you merge inventory items, QuickBooks merges ALL historical transactions, including the purchases, sales, average costs, etc.
attempting to merge your items, make sure to create a backup of your company
file. This is in case you need to undo the actions done.
To merge two items:
Merging items needs careful consideration for this results in a different inventory reduction on all sales transactions, and that means all historical financial statements will be different after your merge. This is definitely something we recommend you
consult with your accountant or legal adviser.
Let us know if you have other concerns.
Have a great day!