The issue here is that the user's form is not showing to logged out users.
Solution:
The issue here is a permissions issue where the form isn't accessible to guests. To fix this go to Toolset -> Access Control-> Toolset Forms then check to see if your form is here then set it so that Guests can view the form.
Problem: I would like to allow Users to create a post using Forms, but only fill out part of the post information in the first form. In subsequent forms, users should have the ability to add more information in a stepped approach.
Solution: Use one New Post Form and two Edit Post Forms to achieve this stepped approach with partial form captures. Use expert form builder mode to delete required fields from each form as needed.