You have two choices.
1) Call TurboTax Customer Service on Monday when the open. https://ttlc.intuit.com/questions/1899263
2) Since your .tax2015 file is physically on your computer, create a new online account and start anew. To do that, log out of the account you're using right now. Then below the password field select the "create account" link and go from there. You can create up to 5 accounts per e-mail address. Now for the really important stuff that everybody forgets.
*WRITE DOWN THE LOGIN INFORMATION FOR ALL ACCOUNTS!* Otherwise, you'll be confused beyond help next tax filing season.
