If you removed her as a dependent, she would be able to claim the credit, but she would NOT be able to take the refundable part of the credit since she is able to be claimed even if she is not claimed. So, if her tax liability is already at $0, it would not help her.
If she does have some tax liability, then she would benefit by decreasing her tax liability as far down as $0.
As far as future year ramifications, there really wouldn't be any. For the most part taxes are filed independently of the other years.
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