Customer:
I cannot find anywhere torial or place I can find this? (usps-woocommerce-shipping-11).
Support:
The Price adjustment option appears in the plugin settings. You can add a certain value or a % to the shipping services.
Kindly go to the following link:
http://support.wooforce.com/hc/en-us/articles/206968479-Setting-Up-WooCommerce-USPS-Shipping-Plugin .