The settings are shown below
API & Debug
Go to: WooCommerce > Settings > Shipping > USPS.
1. USPS User ID – You can use our USPS User ID (this is set automatically) or sign up for your own at Webtools account on USPS.com.
2. Debug Mode – Enable debug mode to show debugging info on your cart/checkout. This information is shown only to administrators who are logged in.
USPS settings
– Check the enable checkbox to enable the plugin and use the Production key for the production server
Origin Postcode: Enter the origin postcode.
Origin Country and State: Choose the origin’s country and state from the dropdown value.
Package Dimension/Weight Unit: you can see the following options in the dropdown.
1. Pounds & Inches
2. Kilograms & Centimeters