Good day, @KellyNWalters1.
I'll share with you some knowledge about inventory in QuickBooks Desktop (QBDT).
Since you didn't use the inventory feature, you can post the shelves item by creating a Sales Receipt in QBDT. That said, you don't need an account. Please make sure that the amount is zero and there's a quantity entered.
Here's how:
- Go to the Customer menu, then choose Enter Sales Receipts.
- Choose customer's in a drop-down arrow.
- Under Item, pick the item that you've previously used.
- Enter a quantity in the box, then leave the amount to zero.
- Tap Save & Close.

By doing this, to see that there was a reduction in the number, but there's no income occurred. For more details, check out this article: Create sales receipts.
I've attached an article about managing inventory for your prospective reference:
Please know that I'm only a few clicks away if you have any follow-up questions. Take care!