I've used Turbo Tax for 7 years and unfortunately didn't find out until this year that they have wrongly advised me that I owe city tax, every year.To determine if you owe city income tax, you must look at your actual municipality (governmental boundary) rather than just the city listed in your mailing address. How could Turbo Tax not know this? I am outside of the boundary and didn't owe the taxes. I have paid the premium price with all the extras that TT offers, and city taxes, for 6 years. I am out several thousand dollars and they won't do anything to help. I either get disconnect or told that it was my fault for agreeing "that everything looks correct" on my taxes. I trusted that everything was correct, that's why I used them. If I knew all the ins and outs of taxes, I wouldn't have paid for their 100% guarantee. I could also go to an accountant for the price they now charge. I don't mind paying for protection but they don't stand behind it if they make a mistake.