• I want to add a tax on custom fee. tax calculation is perfect and gets tax amount but it's not set in TAX files in quote_address in the database.

    public function collect(
        \Magento\Quote\Model\Quote $quote,
        \Magento\Quote\Api\Data\ShippingAssignmentInterface $shippingAssignment,
        \Magento\Quote\Model\Quote\Address\Total $total
  • I try to set tax Amount in collect method but it's not set.

  • I want to same like this thiscode. it's Magento1 but I want Magento 2


2 Answers 2


You may please use below code to set tax amount in quote address and quote tables:

$quote->setTaxAmount($total->getTaxAmount() + $taxAmount);
$quote->setBaseTaxAmount($total->getBaseTaxAmount() + $taxAmount);

$address = $shippingAssignment->getShipping()->getAddress();
$address->setTaxAmount($total->getTaxAmount() + $taxAmount);
$address->setBaseTaxAmount($total->getBaseTaxAmount() + $taxAmount);

I hope this help to you. If you have any further query feel free to ask.

Happy to help!



Instead of a call to $total->setTaxAmount() you need to use addTotalAmount:

$total->addTotalAmount('tax', $amount);
$total->addBaseTotalAmount('tax', $baseAmount);

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