How to combine two forms ?

I did changes to a clone of my form, so I could develop and test it. Now I'm done and I don't know how to change the old form to the new one.

Is it somehow possible to keep the same link as before and to keep the submissions in that form (old and future new submissions together)?

Hi,

Unfortunately, there is no way to combine both forms, however, I think you could export your submissions data and then import it in the new form, take a look at this guide in order to know how to do it : http://www.jotform.com/help/308-Import-App-Easily-import-your-Excel-or-CSV-data-into-JotForm 

In regards to use the same link, you will need to re-embed your form again in order to receive your submissions in your new form.

Hope this helps.

Regards.