To access the Billing Setting, you must have a user role Owner on the account.
Follow these steps to find your invoices:
Step 1. Click on your account avatar in the upper right corner and then click on Profile Settings
Step 2. Go to the "Subscription" tab.
By opening the "Subscription" tab, you can look at:
Features you're buying
Size of storage usage
Number of projects
The ability to upgrade your subscription
If you would like to download an invoice/receipt please follow these steps:
Step 1. Click on the "Billing Settings" button
Step 2. In the window that opens, scroll to the very bottom to the INVOICE HISTORY and click to open an account (example in the picture below)
Step 3. Then click on “View invoice details” (example on picture below)
Here you can look at the amount of user seats (including Owner seat), storage, and download the invoice/receipt: