The Clients Tab is found in an Itinerary. It is home to the Details Subtab and the Notes Subtab.
The Details Sub Tab is where the details of the passengers travelling, such as name and age, are listed. It is also where payments and refunds are recorded for an Itinerary.
The Passenger Type field can be accessed in the Itinerary > Clients Tab > Details Subtab > Passengers grid. This field is designed to help with categorizing Passenger Types in Group itineraries and can be used in conjunction with the existing Age-group field.
The Notes Subtab provides an area for recording client notes. The main purpose of this field is to record important client information for the Supplier email booking requests.