HOW IS THIS NOT POSSIBLE? Today I was contacted by a customer who said that we'd put the wrong amount in the customs info. He has to pay VAT on his end, so it's an important error to fix. All i need to do to fix it is send UPS an updated customs form. But with ShipStation, I can't just go in and edit it and send them a new one. It's not possible. And I can't believe this isn't already a feature. Now it's a huge headache to figure out how to create my own updated commercial invoice.