Changing email address when submissions come in.

I am not sure if I have understood your question correctly. Do you mean to say that you want to change the email address on which submission emails are sent?

You need to edit your form's notification email alert and change the "Recipient Email" to desired email address. You may like to take a look at the following guide which should help you: https://www.jotform.com/help/41-How-to-Change-the-Email-Address-Used-for-Notification-Email

Hope this helps.

Do get back to us if you have any questions.