If Turbotax messed up on return about child not listed on EIC but on rest of forms, already paid $100+ to have taxes done right & wasn't, do I have to pay again to amend?

The child is a minor which qualifies for EIC yet Turbotax did not list them under the EIC credit. I also listed that I had them the entire year. Why were they not qualified as EIC? I should not have to pay $200 to speak to a tax professional to find out this answer when I already paid for the service to have my taxes professionally done correctly the first time. I would not mind if I could afford these kinds of things.