Some invoices may require more detail in the form of line items, particularly codes for medical aid submission.
Line items can be added via an appointment, by going to the Statement view or the Invoices page. They can be added to a single appointment, one at a time or they can be added to multiple appointments at once.
Once you've landed on editing the actual invoice, these are the steps to follow:
Adding a line item to one appointment:
Adding line items to multiple appointments: