If you have a parent education loan in your name that was taken out while your daughter was your dependent, you can continue to take the student loan interest deduction even when she is no longer your dependent.
You could possibly claim her as a dependent because she is considered full time student if she was full time for at least 1 day in 5 different months. But if she files a joint return with her spouse, that trumps everything else and you can't claim her as a dependent then.
