The exemption settings for this plugin are not working (using WooCommerce 4.0.1 and Astra theme). I need to allow customers to indicate that they are tax exempt on the checkout form, so I enabled tax exemptions in the plugin settings and set “Restrict to User Roles” to no. Now a “tax exempt?” checkbox appears on checkout, by checking it does not seem to have any effect. The order summary on the checkout page still shows sales tax being applied.