Quantities appear in the Received column only if you use the Receive Items feature

In addition to Bill, Order and Quote, an Item purchase also has the Receive Item status. You'll use this status with inventoried items only. You'll use this status when you receive an inventoried item, but no bill accompanied the item -- you're not sure of the final purchase price.

When you record a purchase using the Receive Items feature, the item is added to your inventory, but the cost of the item is added to your Linked Account For Item Receipts (A/P Accrual - Inventory) until you record a bill for it. You're Accounts Payable account isn't affected at this time.

You'll use the Receive Items feature to enter the quantity "received" for an item. That is, in order to enter a quantity in the Received column of purchases, you must use the Receive Items feature. When you record an item receipt, an order is created. The quantity entered on the item receipt will appear in the Received column of the order; the quantity will be display-only.

When you're ready to record the Bill, you'll choose the order. When you record the Bill, the purchase price will be transferred from your Linked Account For Item Receipts (A/P Accrual - Inventory) to the Accounts Payable account.