How can I use this form, save it to a file and then go back and edit it?

Also, not understanding how I can use this form, save it to a file and then go back and edit it.  What am I missing?

If you want to be able to edit a form submission, please check this guide: https://www.jotform.com/help/325-How-to-Edit-Submissions-Made-on-Your-Forms 

If you were actually referring to something else, please explain further.