No. Never start another return by going back and overwriting everything in the return you just filed. This will replace your info, which means you won't be able to retrieve your return later. You can reuse your email address if you want to receive e-file notifications for your sons return but you will need to create a new user account. Please follow the procedure to create a new account in the TurboTax FAQ below:
https://ttlc.intuit.com/replies/3288574
