Go to your personal information and scroll down to your mailing address. I noticed on mine that the street address wasn't showing, however, when I went in to Edit it, the address was there. I just re-entered the information and then it appeared as it should. I'm thinking that the information transferred over from last year's return wasn't populating the fields properly. Anyways, re-entering the address info fixed it for me and I was able to transmit my taxes!