You can find and download your receipts right from your Site Settings > Site > Receipts.
Subscription and SmugMug Source receipts.
Click the View Receipts button, and new window will open with the available receipts to view.
Next, click the View button to download any particular receipt.
If you previously subscribed using Amazon Payments, you can find a copy of your receipt here.
Order receipts.
Any print orders you've placed as the logged-in account owner can also be found in your Site Settings > Site > Receipts. Scroll down to, My Orders section.
Click on an Order Number to open the details for that order.