No, you'll need to set up a new account for her with its own UserID & password (you can use the same email). The online versions of TurboTax only allow one return to be filed per account.
When you go to TurboTax.com and click on the "Sign In" button, you'll see the box to enter UserID & Password. Below that box is a blue-colored link that says Create an Account. Click on that and follow the prompts and TurboTax will walk you thru the new account setup procedure.
