An invoice is created in the following scenarios:
Marking a session complete: When you mark a session complete after the appointment has taken place, an invoice will be automatically generated.
Booking an appointment for a paid-in-advance service: When you schedule an appointment for a service set to be paid in advance, an invoice is generated at the time of booking.
Creating a “New” invoice in billing: You can manually create an invoice not associated with a scheduled appointment by using the “New” button in the billing section.
These options ensure that your invoicing is handled promptly and efficiently for each client session.