public function getAdyenPaymentFeeInvoiceFeeLabel()
    {
        $taxConfig = Mage::getSingleton('adyen_fee/tax_config');
        $source = $this->getSource();

        if ($taxConfig->displaySalesPaymentFeeInclTax($source->getOrder()->getStoreId())) {
            $label = $this->helper('adyen')->__('Refund') . " " . $this->helper('adyen')->__('Payment Fee (Incl.Tax)');
        } elseif ($taxConfig->displaySalesPaymentFeeBoth($source->getOrder()->getStoreId())) {
            $label = $this->helper('adyen')->__('Refund') . " " . $this->helper('adyen')->__('Payment Fee (Excl.Tax)');
        } else {
            $label = $this->helper('adyen')->__('Refund') . " " . $this->helper('adyen')->__('Payment Fee ');
        }

        return $label;
    }