seems to be working fine for me...which box did you check at the top in that 18-23 smart worksheet?  Its an oddly worded question with a double negative or something, if you choose NO, the form will not compute.

I just tested it for a 19 year old and a 14 year old each with 2500 in interest and it computed fine for me.

Income limit is $2700

Pro Series always has problens every year.

 Schedule C form wont let you scroll and fill it out. Im sick of pro series. Customer service is a joke

Hi @LMH nice to see you in the Community and thanks for posting about Form 8615 not calulating. We would reach out to ProSeries Support for help with this. They would be able to remote in and take a look with you.