public function get_tax_on_fees() {
    $tax  = 0;
    $fees = edd_get_cart_fees();

    if ( $fees ) {
      foreach ( $fees as $fee_id => $fee ) {
        if ( ! empty( $fee['no_tax'] ) || $fee['amount'] < 0 ) {
          continue;
        }

        
/**
 * Fees (at this time) must be exclusive of tax
 */
        add_filter( 'edd_prices_include_tax', '__return_false' )  <;
        $tax += edd_calculate_tax( $fee['amount'] );
        remove_filter( 'edd_prices_include_tax', '__return_false' );
      }
    }

    return apply_filters( 'edd_get_cart_fee_tax', $tax );
  }