Reply to recipient

Are you referring to the "Reply-To Email" in the autoresponder/notification emails? Would you like to change it? If so, just head over to the form builder and click "Emails".

Edit your autoresponder

Go to the recipients tab and change the email there:

Do the same for the notification email. For the notification email, you can only select the email field from your form since this is where the submitters enter their email address. 

For more details, please check the following guide:

https://www.jotform.com/help/30-Explanation-of-Email-Notification-and-Autoresponder-Settings