Tax Year Prior to 2020: Claiming daughter as a dependent

My daughter is 19.  She goes to school part time because she has prereqs to take and then has to apply and get accepted into the program.  So she can’t go full time until accepted.  She works part time but made more than $4200.  She lives at home full time and we support her far more than 50%.  So TT is not letting me claim her as a dependent.  So I lose the credit.  

what can I do?