Prepopulating fields in jotform

I am creating a feedback form. I have a different excel sheet with all the personal details of the candidates. I want to design a form that only takes email id's of the candidates, so that when I download the jotform submissions, I have all the details from jotform as well as excel file. The details which I have in excel have been created as hidden fields in jotform. Tried using http://import.jotform.io/ but it creates a cmplete new entry instead of just prepopulating the hidden field. 

Is there any other way I can do this ? Please help me out soon.

Hello,

I'm sorry but I'm having difficulty understanding your concern.

To explain the purpose of http://import.jotform.io, what this does is it imports the submissions from the excel to the form and make it part of the submissions.

If what you want is to just prepopulate certain fields when a form user visits a form, this user guide will provide the information on how to make it happen: https://www.jotform.com/help/71-Prepopulating-Fields-to-Your-JotForm-via-URL-Parameters

If any of these information does not meet to what you are looking for, it would be great if you can provide more details, including the actual for you are working on.

Thanks.