For the majority of filers, your result may be the complete opposite of the norm. No tax software deserves to be mentioned as "the best solution". The worst case scenario is that a particular company promises you riches on your return, when in fact you are legally in the red for the given year. This reality can swap back and forth between the tax provider and the individual - provider X may be the best for one person, while provider Y may be the best for someone else. A single tax provider will rarely be ideal for any two people. Never go with a tax company purely based on recommendation.

The facts always outweigh any "guarantee", unless they are contractually and legally covering your refund against any wrong on their part (and even then, you have to prove you haven't lied or entered any typo on your return, in which case any mistake on your part can be seen as fraudulent). Always get a second opinion on your tax return, by manually putting in the effort to compare an initial result against a competitor. My parent says "TurboTax found several thousand dollars" in a "fairly complicated tax situation". Oh, really? Good for you. Not so much if for some reason either a) one misreports their situation, or b) "TubroTax" (or any other company) miscalculates one's personal situation.

Seriously, don't believe any recommendation for any tax software. Even if the odds of being a victim of a corporate shill are 0.0001%, you're only potentially fucking yourself. No private company can guarantee your safety against the government. Do yourself a favor and check your yearly tax return against multiple offerings to ensure they are a) not purposely misrepresenting your return, and b) don't have a bug that reports a situation differently than the facts of your case.

Yes, it's sad that I see a comment starting with "TurboTax found several thousand dollars for me in a fairly complicated tax situation" as being a possible shill. I'm sorry, but I don't care - every single tax return should be checked against multiple companies. Even if this is a legitimate customer rather than a shill, the odds of their result being representative of the majority is too much of a risk when you consider that you are 1 v. 1 against the government with each tax return. Cover your own ass(ets); don't depend on someone else to give you a recommendation for "the best tax software". Put in enough effort to determine your individual results against your government's requirements, not any private sector company's supposed "'guarantee of results'".