After you file

I turned 24 in September 2019.  I was a part time graduate student also working.  I made in excess of 30k last year.  My father told me when he attempted to claim me he couldn't so I assume I could have claimed myself although I wonder why Turbotax didn't know that since they knew my age and amount of money I made. I would think when I selected someone else will claim me they would have told me they can't