See the following: https://ttlc.intuit.com/questions/3113432-who-can-i-claim-as-my-dependent
Even if she must file her own tax return she can still be a dependent as long as she reports that she can be claimed as a dependent by someone else.
also see the following to see if she may need to file a tax return.
https://ttlc.intuit.com/questions/1901402-do-i-need-to-file-my-own-taxes-if-i-m-a-dependent
Answers are correct to the best of my ability but do not constitute legal or tax advice.
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