Where do my applications go once they have been submitted?

All form submissions can be viewed in the Submissions page. Here's a guide: https://www.jotform.com/help/269-How-to-View-Form-Submissions.

You may set up an email notification so that you will be notified via email when someone completed your form. Here's a guide: https://www.jotform.com/help/25-Setting-up-Email-Notifications.

Hope that helps. Thank you.