If it won't let you start over and you don't want to go back in and fix the W2s since you are in the Free Edition and haven't paid anything you could set up a brand new account.
Online is only good for 1 return. But you can use the same email address for 5 accounts. How to start another return in the Online version <a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/replies/3288574">https://ttlc.intuit.com/replies/3288574</a>
