Good day, @All Brands Group,
It's nice to see you here again. Let's make sure you're able to add your sub-items in QuickBooks Desktop.
If you're experiencing unusual behavior with your items, it's possible that your list is damaged or corrupted. To get past this, you'll need to Re-sort your list. Here's how:
Once done, go back to the Item List window and drag the diamond icon beside the sub-item towards the parent item to automatically link them. If it doesn't work, I'd recommend trying this in a sample file. I need to know if this is caused by a corrupted component of the software. Here's how:
If you're not getting the same problem on the test file, let's run the Verify/Rebuild Utility to fix data issues within the program. Here are the steps:
To Verify Data:
To Rebuild Data:
Please keep me updated on the result by leaving a comment below. I'm always around to lend you a helping hand. Have a wonderful day!