For the Accuracy Guarantee claims, see: https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-submit-a-claim-under-the-turbotax-1...
But it only covers actual CALCULATION errors in the program, not user error , and it only pays any penalties or interest resulting from that error, not the taxes. Either way, you are still responsible for the increase in tax.
