Not Understanding Turbotax is not a defense: Tax Court Rejects Geithner/Turbo Tax Defense
...It is apparent that a portion of the information petitioner entered into the TurboTax program was incorrect; hence the mistakes made (which resulted in the underpayment) were made by petitioner, not TurboTax. TurboTax is only as good as the information entered into its software program. See Bunney v. Commissioner, 114 T.C. 259, 267 (2000). Simply put: garbage in, garbage out.
Taxes are for the little people, forgiveness is for the big shots. Found at Althouse.