ELEX USPS Shipping Plugin – Where to Add Handling Fees? September 26, 2018 / by Sujith Reghu Customer:I cannot find anywhere to add a handling fee. Is there a tutorial or place I can find this? (usps-woocommerce-shipping-11). Also, do I have to deactivate USPS Simple Shipping for Woocommerce? Thank you!Support:The price adjustment option appears in the plugin settings. You can add certain value or a percentage(%) to the shipping services. Kindly go to the following link: How to Set Up ELEX WooCommerce USPS Shipping Plugin with Print Label? (with Video)We will suggest you delete the Basic version of the USPS plugin and then install the Premium version.