@MaryK4 said "she may be better off if you do not claim her". That's particularly important for 2020, because she will be eligible for the $1800 stimulus / rebate credit.
Under the CARES Act, if she is claimed, or qualify to be claimed, as a dependent on someone else’s 2019 return she did not receive a stimulus check, in 2020. If she qualified as a dependent for 2019, but will not be for 2020, she will most likely get it in 2021, when she files a 2020 tax return.
