After logging in as a guest you can click on 'My Family' in the sidebar to change your family's information. Conference Joy keeps who your family is and how to contact your family member separate from the information needed in the forms that you have to fill out since each conference has different requirements for guest information.
In the 'My Family' section you can edit your family member's name and where to send information for that family member. Some family members may be too young to have an email address; you can decide how messages for those members should be directed.
If you're looking to edit your own information, look in the 'My Profile' section in the pull down menu in the upper right-hand corner.