Invoices will be sent automatically by email at each of the billing cycles (end of month).  

All the new invoices will be stored in your account in the following section: Payment information

This can also be accessed by opening the USER MENU and then by pressing on the configuration button in the top right.

Then select PAYMENTS to consult your current payment information.

Related Articles (Please refer to the links below)

-How to consult my subscription?

-How to upgrade my subscription? 

-Understanding the billing mode

-Budgeto refund policy