当用户输入增值税时，Magento 1.9在结账时取消税

Question

I'm trying to make magento modification when user enter vat number on checkout remove tax from order.

I found a code on stackoverflow which support on magento older version but it not work with new version 1.9,

I made few modifications for work the condition and return 0,even it return 0 checkout still shows tax.

here is my code which is on file

/app/code/core/Mage/Tax/Model/Calculation.php line number 268



    public function getRate($request)
        {
            if (!$request->getCountryId() || !$request->getCustomerClassId() || !$request->getProductClassId()) {
                return 0;
            } 


           //my code
            $ctax= Mage::getSingleton('checkout/session')->getQuote()->getCustomerTaxvat();


            if ($this->getCustomer() && $ctax !='') {
                //echo 'test';
                return 0;          
            }
        //end my code   


            $cacheKey = $this->_getRequestCacheKey($request);
            if (!isset($this->_rateCache[$cacheKey])) {
                $this->unsRateValue();
                $this->unsCalculationProcess();
                $this->unsEventModuleId();
                Mage::dispatchEvent('tax_rate_data_fetch', array(
                    'request' => $request));
                if (!$this->hasRateValue()) {
                    $rateInfo = $this->_getResource()->getRateInfo($request);
                    $this->setCalculationProcess($rateInfo['process']);
                    $this->setRateValue($rateInfo['value']);
                } else {
                    $this->setCalculationProcess($this->_formCalculationProcess());
                }
                $this->_rateCache[$cacheKey] = $this->getRateValue();
                $this->_rateCalculationProcess[$cacheKey] = $this->getCalculationProcess();
            }
            return $this->_rateCache[$cacheKey];
        }

Anyone can help me to make tax 0 when user enters vat number on checkout, Thanks a lot

Answer 1

You can use sales_quote_collect_totals_before event.

then you have to define logic for remove tax on checkout page.

This link you can refer.