Price including tax.php

<?php

// Price including or excluding tax
function tax_price( $data, $feed_id, $product_id ) {
	global $product, $woocommerce;
	
	// Only add this to the feed with id 58
   	// change the number to the feed you want to affect the prices.
   	// OR remove the if statement if you want to affect all feeds
	if($feed_id == 1){
		
		$product = wc_get_product( $product_id );
		
		$currency_symbol = get_woocommerce_currency_symbol();
   
   		// Get the prices
		$price_excl_tax   = wc_get_price_excluding_tax($product);
   		$price_incl_tax   = wc_get_price_including_tax($product);
		// Calculate tax amount
   		$tax_amount       = $price_incl_tax - $price_excl_tax;
	
   		// Store the price with tax AND without tax in the feed custome label X element.
      		// Use $data['price'] OR/AND $data['sales_price'] to set the price to those elements in the feed.
   		$data['custom_label_0'] = "Including: " . wc_price($price_incl_tax);
		$data['custom_label_1'] = "Excluding: " . wc_price($price_excl_tax);
		$data['custom_label_2'] = "Tax ammount: " . wc_price($tax_amount);
		
		// store the price including tax in the price attribute 
		// If you setup the price attribute with Woocommerce currency this will be added automaticaly. (Like EUR or USD)
		$data['price'] = wc_price($price_incl_tax); 
		
	}
   	// Always return data!
   	return $data;
}

add_filter( 'wppfm_feed_item_value', 'tax_price', 10, 3 );