Checkout: Filter - checkout_admin_orders_export_data Example

gistfile1.php

<?php

function orders_export_data($data = null, $headings = null) {
    
    foreach ($data as $dkey => $dval) {
        //add a value to the tax of each order for example
        $data[$dkey]['tax'] += 10;
    }
    
    return $data;
}

add_filter('checkout_admin_orders_export_data', 'orders_export_data', 10, 2);

?>