You would not claim your dependent's Form W-2 on your
own tax return.
The dependent will need to file their own
return if they are required to file, or if they would like to receive
any refund that they are due. If the dependent files their own
return, they will need to indicate that they can be claimed as a dependent
by someone else. To determine if the dependent is required to file a tax
return to report their income, please see the following TurboTax FAQ:
https://ttlc.intuit.com/replies/3302185
To file an additional return using TurboTax Online,
you will need to create a new account. Please see the following TurboTax
FAQ for instructions on how to start another return using TurboTax Online.
https://ttlc.intuit.com/replies/3288574