After adding an appointment you can also create an invoice from it.
To do this go to your Calendar and choose the required appointment. After clicking on it you will see the button “Create invoice”.
On this page you can add some other products, add discounts, create a delivery slip etc.
You can create an invoice not only for your past appointment but also for future one.
Important!!! If an invoice was already created it isn’t possible to make some changes or cancel the appointment.
To create an invoice on the POS, you need to select the desired appointment in the calendar and then click on "Create invoice".