A link to the invoice of your purchase is in the order confirmation email you get from the FastSpring as soon as you complete the purchase on our website.
In case you cannot find that email anymore or you need to change details on the invoice you can always retrieve your invoice (including official VAT invoices for business purchases) following these steps:
Go to the FastSpring account management page and log in using the email you’ve provided when making a purchase.
Below each order you made on our website, you will find a link to your invoice. Clicking to the link will take you to the page with the invoice.