If you need to edit the address for an order you're importing from your ecommerce platform, you'll need to do that in your ecommerce platform. Once the order has been updated in your ecommerce platform, you can click the Refresh Data button in the Import page in Pirate Ship to see the updated address.
If you cannot change the order's address in your ecommerce platform or marketplace for some reason, then you'll need to create the label manually using the Single Label form in Pirate Ship, and then copy/paste the tracking number back to your platform to mark the order as Shipped.
Some ecommerce platforms don't let you edit addresses, like eBay. For those, you'll need to create a label manually.