In jAnswers Factory you can integrate the Community Builder profile component to extend the user profile.
CB comes with some assignable generic fields but you will also need to create your own to assign the jAnswers Factory fields to the ones from CB. This can be done by going to Components/Community Builder/Field Management.
Please install CB first, or the generic fields will not be displayed.
Check this page for more detailed information about setting up your Community Builder fields for our extensions: Community Builder Fields for thePHPfactory Joomla Extensions
Correct field mapping will be required to display information properly between the questions, profiles and other plugins.
(!) Documentation based on jAnswers Factory version 4.2.0