In your store's Admin area, go to the Sales > Orders > Edit Order
The details of an existing order can be changed or updated by the store owner.
There are various reasons why you might need to edit an order after it has been placed. Customer can contact you with a shipping address correction request or you find you do not have enough stock for an order or receive a request to change delivery method.
To add products to the order search with Add Product(s) field. A list of products will appear. Select the product you wish to add then input quantity, options if available
