Turbotax relies on the accuracy of input to produce an accurate return. most of the time when a refund is reduced or a taxpayer owes additional taxes it's because they missed something or entered an inaccurate amount. common are the EIPs and advanced child tax credit. if you believe Turbotax miscalculated your taxes which cost you penalties and or interest you can file a claim. you are still the one responsible for any additional taxes.
