To connect your shipper, start by choosing "Manage Shipping" from the Admin --> Settings screen
Manage Shipping Screen
Next, click the "Connect New Shipping Account" button
Carrier Setup Screen
You will now be on the Carrier Selection page. After you choose a carrier, you will be presented with a set of fields that are required by the shipping carrier.
FedEx requires the following fields:
UPS requires the following fields:
USPS(stamps.com) requires the following fields:
Once you have entered all required information, click "Save Connection" at the bottom right and you will be connected!