When you login to TimeTap for the first time you will notice that any custom fields you created in checkAppointment are already in TimeTap, as long as these fields were assigned to a service or class. In this page we will focus on adding and editing custom fields, one thing to mention is that you can create a set of custom fields and assigned them to specific services, classes and clients.
We've written extensively about how to customize your custom fields in our documentation.
In checkAppointments if you wanted to create a custom field, first you will need to create a form, add the custom field and then attach the custom field to a class or service.