Can I change my response email

Can I change the reply email when someone hits submit after completing a form?  I would like to personalize it instead of the CHECK mark that is already there

Are you referring to the Thank-You page that appears every time the form is submitted?

That can be customized using the Thank-You page editing tools from its toolbars.

However, if you are referring to the email autoresponder sent to your respondents after they have successfully submitted your form, then you may refer this guide — How-to-Edit-the-Email-Template-for-Notifications-and-Autoresponders