Right now Shed Suite doesn't support editing an order once it's submitted. We are working to change the system to make so this is possible in a smart auditable way. But for now, the best way to change an order is to cancel the order and then open the quote that was saved for that order and make the changes needed and then submit the new order.
In this video we will walk you through how this works in the app as an admin canceling the order and as a dealer picking up the quote and submitting a new order.