TurboTax only guarantees that the calculations made by the software are 100% Accurate. They do not guarantee that the tax data from the forms entered into the program by the user of the software are accurate nor any omissions of tax data by the user of the software.
TurboTax support FAQ for the 100% Accurate Calculation guarantee - https://ttlc.intuit.com/community/charges-and-fees/help/what-is-the-turbotax-100-accurate-calculatio...
