BasketBase::getVatSum

public function getVatSum()
{
	$vatSum = 0;

	/** @var BasketItemBase $basketItem */
	foreach ($this->collection as $basketItem)
	{
		// BasketItem that is removed is not involved
		if ($basketItem->getQuantity() == 0)
		{
			continue;
		}

		$vatSum += $basketItem->getVat();
	}

	return $vatSum;
}