unable to add invoice fee tax in magento order total - magento

Question

I am working on magento 1.7. i am working on payment gateway where i have added invoice fee now i have to add tax of invoice fee in tax group
please anyone help to solve this problem here is following my code i have tried to add tax amount in taxes but still not working may be i am doing something wrong
<?php
class ***_******_Model_Quote_TaxTotal
extends Mage_Sales_Model_Quote_Address_Total_Tax
{
public function collect(Mage_Sales_Model_Quote_Address $address)
{
$quote = $address->getQuote();
if (($quote->getId() == null)
|| ($address->getAddressType() != "shipping")
) {
return $this;
}
$payment = $quote->getPayment();
if (($payment->getMethod() != 'invoice')
&& (!count($quote->getPaymentsCollection()))
) {
return $this;
}
try {
/**
* Instead of relying on hasMethodInstance which would not always
* work when i.e the order total is reloaded with coupon codes, we
* try to get the instance directly instead.
*/
$methodInstance = $payment->getMethodInstance();
} catch (Mage_Core_Exception $e) {
return $this;
}
if (!$methodInstance instanceof Mage_Payment_Model_Method_Abstract) {
return $this;
}
if ($methodInstance->getCode() != 'invoice') {
return $this;
}
$fee = $methodInstance->getAddressInvoiceFee($address);
if(Mage::getStoreConfig('payment/invoice/tax_class') == '' ){
return $this;
}
$invoiceFee = $baseInvoiceFee = Mage::getStoreConfig('payment/invoice/_fee');
$fee = Mage::helper('invoice')->getInvoiceFeeArray($invoiceFee, $address, null);
if (!is_array($fee)) {
return $this;
}
$address->setTaxAmount($address->getTaxAmount() + 5454+ $fee['taxamount']);
$address->setBaseTaxAmount(
$address->getBaseTaxAmount() + 5454+ $fee['base_taxamount']
);
$address->setInvoiceTaxAmount($fee['taxamount']);
$address->setBaseInvoiceTaxAmount($fee['base_taxamount']);
return $this;
}
}
and this is config.xml
<sales>
<quote>
<totals>
<fee>
<class>invoice/sales_quote_address_total_fee</class>
</fee>
<invoicetax>
<class>invoice/quote_taxTotal</class>
<after>subtotal,discount,shipping,tax</after>
<before>grand_total</before>
</invoicetax>
</totals>
</quote>
</sales>

Answer 1

your code must be following i have following i modified your code
<?php
class *****_******_Model_Quote_TaxTotal extends Mage_Sales_Model_Quote_Address_Total_Tax
{
public function collect(Mage_Sales_Model_Quote_Address $address)
{
$collection = $address->getQuote()->getPaymentsCollection();
if ($collection->count() <= 0 || $address->getQuote()->getPayment()->getMethod() == null) {
return $this;
}
$paymentMethod = $address->getQuote()->getPayment()->getMethodInstance();
if ($paymentMethod->getCode() != 'invoice') {
return $this;
}
$store = $address->getQuote()->getStore();
$items = $address->getAllItems();
if (!count($items)) {
return $this;
}
$custTaxClassId = $address->getQuote()->getCustomerTaxClassId();
$taxCalculationModel = Mage::getSingleton('tax/calculation');
/* #var $taxCalculationModel Mage_Tax_Model_Calculation */
$request = $taxCalculationModel->getRateRequest(
$address,
$address->getQuote()->getBillingAddress(),
$custTaxClassId,
$store
);
$InvoiceTaxClass = Mage::helper('invoice')->getInvoiceTaxClass($store);
$InvoiceTax = 0;
$InvoiceBaseTax = 0;
if ($InvoiceTaxClass) {
if ($rate = $taxCalculationModel->getRate($request->setProductClassId($InvoiceTaxClass))) {
if (!Mage::helper('invoice')->InvoicePriceIncludesTax()) {
$InvoiceTax = $address->getFeeAmount() * $rate/100;
$InvoiceBaseTax= $address->getBaseFeeAmount() * $rate/100;
} else {
$InvoiceTax = $address->getPaymentTaxAmount();
$InvoiceBaseTax= $address->getBasePaymentTaxAmount();
}
$InvoiceTax = $store->roundPrice($InvoiceTax);
$InvoiceBaseTax= $store->roundPrice($InvoiceBaseTax);
$address->setTaxAmount($address->getTaxAmount() + $InvoiceTax);
$address->setBaseTaxAmount($address->getBaseTaxAmount() + $InvoiceBaseTax);
$this->_saveAppliedTaxes(
$address,
$taxCalculationModel->getAppliedRates($request),
$InvoiceTax,
$InvoiceBaseTax,
$rate
);
}
}
if (!Mage::helper('invoice')->InvoicePriceIncludesTax()) {
$address->setInvoiceTaxAmount($InvoiceTax);
$address->setBaseInvoiceTaxAmount($InvoiceBaseTax);
}
$address->setGrandTotal($address->getGrandTotal() + $address->getPaymentTaxAmount());
$address->setBaseGrandTotal($address->getBaseGrandTotal() + $address->getBasePaymentTaxAmount());
return $this;
}
public function fetch(Mage_Sales_Model_Quote_Address $address)
{
$store = $address->getQuote()->getStore();
/**
* Modify subtotal
*/
if (Mage::getSingleton('tax/config')->displayCartSubtotalBoth($store) ||
Mage::getSingleton('tax/config')->displayCartSubtotalInclTax($store)) {
if ($address->getSubtotalInclTax() > 0) {
$subtotalInclTax = $address->getSubtotalInclTax();
} else {
$subtotalInclTax = $address->getSubtotal()+ $address->getTaxAmount() -
$address->getShippingTaxAmount() - $address->getPaymentTaxAmount();
}
$address->addTotal(
array(
'code' => 'subtotal',
'title' => Mage::helper('sales')->__('Subtotal'),
'value' => $subtotalInclTax,
'value_incl_tax' => $subtotalInclTax,
'value_excl_tax' => $address->getSubtotal()
)
);
}
return $this;
}
}