Hi Buzzby and welcome to the forum!
This is easy to do. You need to go to Data Connection. In the Designer, go to Tools->Data Connections and click Add. Select Submit data and click Next. Select "As an e-mail message" and click next. A dialog will appear that has lines for To:, Cc:, Bcc:, Subject:, Intro, and form attachment. Click on the "fx" button next to the To: line and click Insert Field or Group. Select the Field from your main data source. Click OK, and specify others if you want. Click Next and Finish. Note: the field must be a valid e-mail address.
Patrick Halstead [InfoPath MVP]
InfoPathDev
Patrick Halstead
Project Manager at Qdabra