/**
  * Init gift wrapping and printed card tax rate for address
  *
  * @param   Mage_Sales_Model_Quote_Address $address
  * @return  Enterprise_GiftWrapping_Model_Total_Quote_Tax_Giftwrapping
  */
 protected function _initRate($address)
 {
     $store = $address->getQuote()->getStore();
     $billingAddress = $address->getQuote()->getBillingAddress();
     $custTaxClassId = $address->getQuote()->getCustomerTaxClassId();
     $this->_request = $this->_taxCalculationModel->getRateRequest($address, $billingAddress, $custTaxClassId, $store);
     $this->_request->setProductClassId($this->_helper->getWrappingTaxClass($store));
     $this->_rate = $this->_taxCalculationModel->getRate($this->_request);
     return $this;
 }