Income shouldn't be a problem in you claiming your 19-year-old daughter who is a full-time student. Make sure you state that she is indeed a full-time student and her age is correct. Also, understand that time away from home at school is called a temporary absence and counts as her living with you. Check the answers to the other dependency questions.
She will probably fall under the "Qualifying Child" rules where income isn't even an issue.
See this:
A qualifying child:
- They are related to you.
- They aren't claimed as a dependent by someone else.
- They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.
- They aren’t filing a joint return with their spouse.
- They are under the age of 19 (or 24 for full-time students).
- They live with you for more
than half the year (exceptions apply).
