Set Up USPS with Online Lookup Shipping

Located under Ecommerce/Shipping Methods -> Shipping Methods Editor/General Section/How to Calculate Charges Menu

Overview:

• In the How to Calculate Charges Menu, choose: 
  • Calculate with a Shipping Carrier's Online System - *Use for USPS, UPS or FedEx Lookup Tool
  • Then Choose USPS from the Carrier Menu
  • Create One Shipping Record for each type of Shipping Service you would like to offer.