Can i obtain my sisters tax return which i filed for her on turbotax how?

[Critter]

The only way to access a return is to log in with the correct UserID and password ... do you have these ? 

[VolvoGirl]

Did you use the Online version?  Hopefully you used a different account than your account.  Online is only good for one return. So if you did another return in the same account it overwrote the first one.

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/