How do I delete an answer or change the answer on HSA distribution. I answered wrong and Tax Cut will not take me back to that answer. It brings up the wrong thing.

I did not understand and put in the wrong answer for distribution of HSA. Do I have to redo the entire Turbo Tax form?  Why can I not edit or delete that answer.  I used all the HSA on Medical and it is not taxable but Turbo Tax will not let me correct my wrong answer and fix the mistake!