Possibilitiies
1) That can happen if you are using the Online, web-based software, and you prepared a tax return for her, and are now trying to prepare your own in the same Online account. That's something that is not allowed. Each Online tax preparation requires an entirely different account, UserID, and pwd. If that is what you have done, you need a new account to do yours. Unfortunately, if you've been entering actual data in her tax file account, you may have irreversibly ruined her tax file....so I hope you already have a printout of her tax file.
2) If you are using the desktop software, just start a new file from scratch. Only the desktop software allows multiple tax files to be prepared from the same software set.
3) Nothing above covers your situation? Then call Customer support during their weekday work hours (Must be using any Desktop version....or Online PLUS, Deluxe, Premier, or SE. Cannot call them if you are using "Free" Edition):
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
