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: https://www.xadapter.com/2016/11/10/setting-woocommerce-usps-shipping-plugin/We will suggest you delete the Basic version of the USPS plugin and then install the Premium version.