In the E-commerce section, you can learn how to edit the orders that you have placed. Keep in mind that the order can be edited only if it has an In Progressstatus.
Unable to Edit the Shipping Information
Once you add the first item to your shopping cart, the order header will be locked (ship date, carrier, ship to, PO #). To be able to edit this information, you must remove the products from your shopping cart first and proceed to edit the information required.