How can i have a functioning form for the back-end area.
Since RSform!Pro 1.4.0 (Revision 40), you can now assign a form to the back-end Components menu item. This will be an individual entry that will inherit the title for the form. The menu assignment is done by clicking on the Add to backend menu link.
Though it provides a basic, standard style, the functionality of the form is the same as if it was submitted from the front-end area: emails, submission, integrations, etc.