TurboTax guarantees the accuracy of the calculations on the tax return. It cannot and does not guarantee that the tax data entered by the user OR imported to the software is accurate.
You always owe your correct income tax. At most, the accuracy guarantee would cover any penalties and interest due to a program mistake. You must file your claim within 30 days of receiving the IRS notice.
See this TurboTax support FAQ for the Accuracy Guarantee - https://ttlc.intuit.com/community/charges-and-fees/help/what-is-the-turbotax-100-accurate-calculatio...
