How do i add a new user to our jotform program

The sub-user feature has recently been removed.  If an account had previously used the feature, they would still be able to add sub-users:

http://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User

However, if the account had not previously used the feature or was created after the feature was disabled, it is no longer available.