array( 'shop_order' ), 'post_status' => array( 'any' ), 'posts_per_page' => - 1, 'fields' => 'ids', 'meta_query' => array( array( 'key' => '_pos', 'value' => 1, 'compare' => '=', ), ), ); $woocommerce_pos_query = new WP_Query( $woocommerce_pos_args ); foreach ( $woocommerce_pos_query->posts as $woocommerce_pos_order_id ) { // check _order_tax and _order_shipping_tax for reports. if ( ! get_post_meta( $woocommerce_pos_order_id, '_order_tax', true ) ) { update_post_meta( $woocommerce_pos_order_id, '_order_tax', 0 ); } if ( ! get_post_meta( $woocommerce_pos_order_id, '_order_shipping_tax', true ) ) { update_post_meta( $woocommerce_pos_order_id, '_order_shipping_tax', 0 ); } }