But ...yes, they do need to file their own tax return....their working income cannot go on your tax return.
And, as @SharonD007 noted, when preparing theirs, it needs to indicate that someone else (i.e. you) will be claiming them as a dependent.
Don't let them do it alone, work on it together.....and IF using the Online software, don't try to use your account to prepare and file it. If using Online software, you'll have to create a new UserID/pwd for the dependent's tax return.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
