you may not have much of a case. in 2017 TT would have calculated estimated taxes for 2018 as needed. it would be your responsibility to monitor your withholding in 2018 to make sure it did not drop and that any estimated tax payments calculated by TT were paid timely. .
but go ahead you got nothing to loose
https://ttlc.intuit.com/questions/1901269-how-do-i-submit-a-claim-under-the-turbotax-100-accurate-ca...
