Fare classes are linked to your transport products. Fare classes allow you to have different prices and different availability per class. E.g. 10 seats available for Economy class and 15 available for First Class.
Select "Products" on the top bar and " Fare classes" from the drop down list.
Select "Add" to create a new fare class
Add the name of the fare class, e.g. Economy, Business, First class
To add the fare class to your transport product you have to go back to the product. Select "Products" from the top bar and "transport" fro the drop down list. Select the name of the correct transport product from the list of transport products.