LIST THE CHILD AS A DEPENDENT!
There is another tax credit of $500 for children over 16 (as long as they meet the other requirements). Turbo Tax will ask you all the questions required.
Also, not to be 'persnickety', but that child born in September.....you were able to claim them for the whole year 17 years ago, even though they were only in your household for a few months . 🙂
