You can use the same email address if you choose however, you would need to create a new login for your tax return. We ask that you create a new login because if you start another return under the your daughter's login it would overwrite everything in the return you just filed. This would replace the original information and you would be unable to retrieve the original return later if needed.
Please follow the steps in the FAQ for instructions on starting another return in TurboTax Online:
https://ttlc.intuit.com/replies/3288574
