The TurboTax online editions can only be used for one tax return per account and User ID. If you used your TurboTax account to complete your daughter's tax return after you had completed and filed your return, then your tax return is gone.
You will need to create a new account for yourself since the current account is for your daughter.
Go to the this TurboTax website and click on the Sign up button to create a new account - https://turbotax.intuit.com/
