I completed my deceased Mother's taxes using Turbo Tax. The taxes were accepted and the balance owed was withdrawn from my account. I just received a letter from the IRS that I owe additional money for "failure to pay proper estimated tax penalty". 1) Should this have been noted by Turbo Tax while completing her return? 2) If I call the IRS (as noted on letter) would penalty be removed since she died in April 2018 and taxes were only withheld from her Social Security and pension for 3 months last year? Any recourse?
