Step 1: Enable Cancel Feature for User

Go to Settings → Users → Access Rights. Check the box for "Stock Cancel Handling Feature".

Step 2: Create a Sales Quotation

Go to the Sales app and create a new quotation. Add the desired product and quantity (e.g., 2 units of Conference Chair).
Click Confirm to convert the quotation into a Sales Order.

Step 3: View the Delivery Order

After confirming the Sales Order, Odoo will automatically generate a delivery order. Go to the Transfers menu in the Inventory app to view the generated delivery order.
The delivery will show status Ready when the product is available.

Step 4: Complete the Delivery

The Delivery Order (WH/OUT/00027) is moved from the “Ready” state to the “Done” state

Step 5: Check Delivered Quantity on Sales Order

After the delivery has been validated and marked as Done, you can verify that the products have been successfully delivered from the Sales Order.

Step 6: Cancel the Delivery Picking

The delivery order now shows the status as Cancelled

Step 7: Check Delivered Quantity on Sales Order

Sales Order shows Delivered = 0.00.

Step 8: Reset the Picking to Draft

After cancelling the delivery, if you need to reprocess the delivery (e.g., correct a mistake, change quantity, or update destination), you can Reset to Draft.

Purchase Order Steps

Step 1: Create New Purchase Order

Go to Purchase → New . Create new purchase order and confirm the order.

Step 2: View the Receipts Order

After confirming the Purchase Order, Odoo will automatically generate an incoming shipment.

Click Validate on the Incoming Shipment to confirm receipt. The status changes to Done, and PO will reflect received quantity.

Step 3: Check Received Quantity on Purchase Order

Step 4: Cancel the Receipts

If something went wrong (e.g. wrong product, wrong quantity), click Cancel Picking on the Incoming Shipment.

Step 5: Check Received Quantity on Purchase Order

Purchase Order shows Received = 0.00.