Contributions were entered already somewhere in the interview (W-2 and/or IRA section) so all the program needs for the 8880 form is any distributions taken in the last 3 tax years. When you are done with all the input you can review the return including the 8880 form.
If you review the 8880 you will see that distributions negates the contributions for the credit ... congress wrote this rule on purpose to keep taxpayers from making a contribution to get the credit then taking an immediate distribution which was not the intent of the credit.
