Do you have the other confirm page already crafted? If not you will need to ensure that you have the page created before you can make use of it.
You can do a very similar thing to what you have done already, you will check the shipping country and based on this send the user to an alternate version of the page. Here is an example of what that may look like.
php:
if(isset($_POST["shipping_country"]) && $_POST["shipping_country"] == ' Alemania'){
header("Location: confirm2.php");
}
This is just an example of what this would look like, it would be up to you to get the custom code implemented correctly.
You can use eCart for your taxes in Canada, you will just need to craft tax rules that look at the country as well as the province and apply the appropriate tax for that region.
