Purchase orders can only be deleted if no items have been received from the purchase order. If any items have been received, the corresponding purchase/receipt must be removed before the purchase order can be deleted. In this case, the purchase order should be closed. See Closing a Purchase Order. Closing a purchase order will remove all remaining 'quantity on order' quantities from inventory.
When a purchase order is deleted, the journal entry is removed from the database and the quantity on order values are readjusted. This action will not affect the income statement or balance sheet since a purchase order represents an allocation of inventory and not an actual purchase (monetary transaction).
Entering a new vendor
Editing a vendor account
Deleting a vendor account
Setting vendor payment terms and credit limits
Entering a purchase order
Editing a purchase order
Closing a purchase order
Checking purchase order status (Purchase Order Manager)
Receiving inventory from a purchase order
Receiving inventory directly from a vendor
Generating a request for quote (RFQ)
Writing a check to a vendor
Issuing a vendor credit memo
Checking vendor balances