Magento 2: How to make custom fee taxable

Question

• 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
  ){
  
    $total->setTaxAmount($total->getTaxAmount()+$taxAmount);
    $total->setBaseTaxAmount($total->getBaseTaxAmount()+$taxAmount); 
  }
  

• 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

Answer 1

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!

Thanks,

Answer 2

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

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