After a booking is confirmed, you can get more information about a booking by using questionnaires.
To create a questionnaire, go to Manage --> Questionnaire Templates and click on Create Questionnaire Template.
Click on New Field and select a field type from the dropdown.
Continue adding fields for the information you need. You can also add more tabs to your questionnaire.
In the right sidebar, you can assign the questionnaire to specific packages, add-ons or mini sessions.
You can set up automated email to remind clients to fill out their questionnaires. When your client logs in, they will be able to see the questionnaires available to them.