Hi there, @MO50

Receiving only part of the inventory in a purchase order (PO) can be done with ease. I'd be glad to show you how.

You can accept inventory with an expense, bill, or check after you record a PO. Recording the items acquired and the corresponding vendor transaction updates the quantity on hand for each item.

Here's how:

1. Click on the + New button.
2. Select Expense, Check, or Bill. 
3. From the Payee dropdown, pick the vendor. This opens a window with their open purchase orders.
4. Select Add for the correct purchase order. This adds the items from the purchase order. They appear in the Item details section.
5. Adjust the quantity or amount for each line item to reflect the portion you received or plan to pay for.
   
6. Hit Save and close.

If you need to unlink a PO, check out this article for the detailed steps: Add purchase orders to expenses, bills, or checks in QuickBooks Online. On the same link, you'll find a write-up about when to use expenses or bills in QuickBooks Online.

You can always count on me if you need additional assistance and let me know on how these steps turn out. I'm just a post away. Have a great rest of your day!