Yes, you can still claim your 23 year old college student daughter as a dependent.
Here are the qualifications:
* be your child (or adoptive or foster child), sibling, niece, nephew or grandchild;
* be under age 19, or under age 24 and a full-time student for at least five months of the year; or be permanently disabled, regardless of age;
* have lived with you for more than half the year; and
* have provided no more
than half his or her own support for the year.
Her time at college counts as time she lived with you.
For more information, follow this link: Turbo Tax on Dependents