Shipping method mapping steps:
- Create the shipping rates in your store (ShipHero will not automatically import rates into the app but you can request your rate card to our support team)
- Create a test order with that shipping option (expedited, overnight, etc).
- Once the order is in the ShipHero Order tab, we’ll have access to map your shop shipping method.
- Go to Settings -->Specific Shipping Methods

You must map the shipping method in ShipHero every time you add a new method to your store so ShipHero can use the configuration for future incoming orders.
Shipping method change on one order:
If you only need to modify one order, you can change the method as soon as the order is placed. The order should be listed as" Ready" and NOT processed. More info HERE

Note: If you are not connecting a store or API you can import Manual orders