Get your taxes done using TurboTax

Last year, I filed and got a letter from the IRS 5 months later that I owed a penalty and more money because Turbo Tax did not calculate properly.  They showed me how to use the tax tables, so I checked this year and once again, Turbo Tax is calculating it wrong.  I can't override the system to fix it.  I can't call anyone to get the tax tables fixed.  This is horrible customer experience.