In order to access your paid receipt or invoice, please login to your account. Next, go to the "My Orders" page.

From there, you can select which order or items you're looking for a receipt on. Once you find the order, you can click on "View Invoice." (If you have an order with multiple items, you'll need to click on the "View Details" button first.)

Clicking on "View Invoice" will automatically download your invoice so you can save it!