Invoice is available for download on the Billing page: https://apps.cerebrohq.com/app/administration/pay.
Also, you will get email notification, with link to invoice.
The licenses will be activated immediately after card payment or invoice request. If an invoice is requested, a temporary license will be activated for 14 days, giving enough time to pay the invoice. After the payment is confirmed, the regular license will be activated automatically.
For the Factory pricing plan, you need to connect the license files that were sent to you by email when you requested the invoice as well as when its payment was confirmed. You can also download the license files via your Billing page.