What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Unfortunately it is not possible to clone existing form along with its submission data but with with a little workaround, it is possible to achieve your requirement. Here are the steps you should follow:
#1. Clone the existing form you have in your account. The following guide should help you: http://www.jotform.com/help/27-How-to-clone-an-existing-form-from-your-account
#2. Export the submission of your main form in excel format: http://www.jotform.com/help/44-How-to-Export-Form-Data-to-Excel
#3. Take advantage of our "Import App" to import data from excel file to your cloned form: http://www.jotform.com/help/308-Import-App-Easily-import-your-Excel-or-CSV-data-into-JotForm
Hope this helps.
Do get back to us if you have any questions.