Thanks for getting back to us, @rprimmer.
Allow me to chime in for a moment and share some information about merging item assemblies in QuickBooks Desktop (QBDT).
Yes, you're right! You need to manually add the items from the assembly you need to inactive to the one you want to use. But before you do that, you need to zero out the quantity of the items on the assembly want to inactive first so that they'll not be deducted to the quantity of the active items.
Here's how:
1. Go to Lists menu at the top, then pick Item List.
2. Double-click the assembly that you want to make inactive, then zero out the quantity of the items on the ITEMS section.
3. Select OK.
4. Then, right-click on the assembly name, then choose Make Item Inactive.
Once done, add the inventory items to the assembly you want to use. Here's how:
1. Double-click that specific assembly.
2. Add the items on ITEM section, then OK.
For future reference, you can also check out this article for further guidance: Create, build, and work with inventory assembly items.
That should do it. Please let me know how it goes or if you have any follow-up questions by leaving a comment. I'm always here to help. Cheering you to continued success!
