No. Your 10 year old will not be allowed to e-file a tax return. The child can file a tax return, but it must be filed by mail. The date of birth entered will prevent e-filing the child's return.
But, yes, the child will need their own account if you use online TurboTax. With online you only get one return per fee. Each return needs its own account and user ID. You can use the same email for up to five accounts. If you use the same account and user ID for more than one return, you overwrite the first return and lose it forever.
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-
online/00/25596
And, of course, you can still claim your child as a dependent on your own return even if the child filed a a return of his own. His return must say that he can be claimed as someone else's dependent.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
