You have the ability to test out the Notification and Confirmation Emails on a form without having to actually fill out and submit the form. To send a test email for a form, go to Settings > Emails & Actions and click on "Send Test Email" next to the email you would like to send.
Next, enter the email address that you would like to receive the email. You can add multiple email addresses by separating each email address with a comma. Feel free to continue editing the emails and sending test emails without having to fill out and submit the form after each change.