Can I claim disabled child who earned $15k per year and is age 25?

I have a child who has a disability who is 25 years old and earned  slightly over $15k last year.  She lived with me all year and I provided over half of her support. She was not a student last year. Can I claim her?  If so, do I enter her income on my return or does she need to file her own return?  Or is it one or the other?