Note: This action can only be taken by Account Owners or users with the "Can view and manage billing settings" permission enabled. Read more about account permissions and how to update a user's settings.
All receipts for your account will be stored under Usage and Billing page, which can be found under Account Settings in the left navigation.
On this page, you can find the Payment History section, where all past payments will be listed. Click on the View Receipt link to download a PDF receipt for each payment.
Whenever a payment occurs, all users with billing permissions will also be sent a notification email with the payment receipt.