It's common to end up with multiple accounts. First LOG OUT of whatever TurboTax account you're logged into right now. Then use this TurboTax account recovery website to get a list of user ID's for an email address. Run the tool against any email addresses you may have used
https://myturbotax.intuit.com/account-recovery/
Hopefully you didn't do his return in your account (or your return in his account). Online is only good for 1 return.
If you used the Desktop installed program then it's only on your computer and not online.
