They say that they did claim me as a dependent due to me living with them for most of the year. However, I see that one of the requirements is that I be under 19 at the end of the year, which I was not. Would me turning 19 in September have disqualified me from being their dependent? I have not attended college, though I was in high school until June 2015.
I am in the 15% tax bracket, so I'll count on paying up to $600, which is fine. Only reason I'd want to question the claim status would be to avoid further confusion/paperwork in the future. My hope is that since I was not notified of this situation until yesterday, I won't be charged late fees for it being close to the end of 2016.
Edit: Turned 19 in September, not December
