No, you cannot claim her as a dependent on your tax return. Since she is 24 in 2019 she can no longer be claimed as a dependent under the Qualifying Child rules where her income would not be a factor since she was a full time student
Now, to be a dependent she would have to meet all the rules for being a Qualifying Relative. One of the rules is that her gross income has to be less than $4,200. Since her gross income is greater than $4,200 then no one can claim her as a dependent.
To be a Qualifying Relative -
1. The person cannot be your qualifying child or the qualifying child of any other taxpayer. A child is not the qualifying child of any other taxpayer if the child's parent (or any other person for whom the child is defined as a qualifying child) is not required to file an income tax return or files an income tax return only to get a refund on income tax withheld.
2. The person either (a) must be related to you or (b) must live with you all year as a member of your household.
3. The person's gross income for the year must be less than $4,200 (social security does not count) in 2019
4. You must provide more than half of the person's total support for the year.
5. The person must be a U.S. citizen or a U.S., Canada, or Mexico resident for some part of the year.
6. The person must not file a joint return with their spouse.
