Magento – Issue with bundle product price not changed on cart page

Well, finally it was really easy... But in fact I have lost almost one week searching the issue of this problem.

It seems that even if you will precise the tax %, in the tax rules, and you will chose tax class "Normal", the same for the product, it will not add tax to your product. It will without tax.

You have to choose tax class Shipping, for tax rule and product. And after that all works like a charm.

You can accomplished this by overriding Mage_Sales_Model_Quote_Item via modules config.xml:

<global>
    <models>
        <sales>
            <rewrite>                    
            <quote_item>Namespace_Module_Model_Quote_Item</quote_item>
            </rewrite>
        </sales>
    </models>
</global>

And then overriding the calcRowTotal()

class Namespace_Module_Model_Quote_Item extends Mage_Sales_Model_Quote_Item
{
    protected $customRowTotalPrice = null;

    public function setCustomRowTotalPrice($price)
    {
        $this->customRowTotalPrice = $price;
    }

    public function calcRowTotal()
    {
        if ($this->customRowTotalPrice !== null) {
            $this->setRowTotal($this->getStore()->roundPrice($this->customRowTotalPrice));
            $this->setBaseRowTotal($this->getStore()->roundPrice($this->customRowTotalPrice));
            return $this;
        }

        $qty = $this->getTotalQty();
        $total = $this->getStore()->roundPrice($this->getCalculationPriceOriginal()) * $qty;
        $baseTotal = $this->getStore()->roundPrice($this->getBaseCalculationPriceOriginal()) * $qty;

        $this->setRowTotal($this->getStore()->roundPrice($total));
        $this->setBaseRowTotal($this->getStore()->roundPrice($baseTotal));
        return $this;
    }

}