Click the menu on the top right in the main view and click on "account".
Then make sure you are on the first tab at the top ("account").
Underneath the box at the top you will find two links one to add your address and one to add a tax number.
These options only show when you have already paid. After you add an address and tax info, the receipts you can download in your account will update.
Add your address and press save when you are done.
If you have purchased a lifetime account and need a receipt but don't see it in your account, reach out to firstname.lastname@example.org and we will send you the receipt via email.