For single use licenses:
When you are logged into your account, select the main menu located in the upper right-hand corner of the site and go to “Licenses”. Select the “...” next to the track and then select “Receipt.” You’ll then be able to download the receipt as a PDF.
For subscriptions:
When you are logged into your account, select the main menu located in the upper right-hand corner of the site and select "Account", and then "Subscriptions" from the menu to the left. You will be able to download the receipt/invoice under each specific subscription listed.