reenter a form

It is not quite clear what your question was about. 

It will help us provide your with the appropriate response and suggestions if you can provide more details about it.

If I am to guess, I think you meant how to refresh or reopen the form.

You can do this by redirecting the form submission back to the form URL.

user guide: -Redirecting-Users-to-a-Different-Page

Here is a test form http://form.jotformpro.com/form/51136155925959?

If you test submit the form, it will redirect back to the form (opens the form again) and ready again for new submission.

Hope this help. Let us know if you need further assistance.

Thanks.