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You can do that by following this guide: https://www.jotform.com/help/314-How-to-Properly-Add-Change-and-Test-a-New-Email-Recipient-Address
To learn more about the settings in the email alert, you can also check this one: https://www.jotform.com/help/30-Explanation-of-Email-Notification-and-Autoresponder-Settings
Basically you need to open the "Emails" wizard and edit the notification/autoresponder there.
I hope that helps.