how can i change the email address the notifications are going to?

You can go to your form settings and click the "Pencil" icon to edit your email notification settings.

Then click "RECIPIENTS" tab.

Here is a more detailed guide in setting up email notifications and autoresponder 

https://www.jotform.com/help/25-Setting-up-Email-Notifications

Or this guide on how to change email recipient based on user's choice/condition.
https://www.jotform.com/help/167-How-to-Send-Email-Based-on-User-s-Answer