Earlier quoted context omitted.
By the way, if you hate the US's horrible tax forms, you should boycott the company Intuit (makers of Mint.com, QuickBooks, TurboTax, and more). Intuit spends a huge amount of money every year lobbying to make sure that tax forms are as complicated as possible: http://techcrunch.com/2013/03/27/turbotax-maker-funnels-mill... So evil!!!
I would point out that Mint.com was a startup at first, and I can't see how it or Intuit can prevent further competitors, e.g. personal capital. So... While I do prefer free tax filing tools over QuickTax, I'm not sure Mint is to blame. If anything, by using a free service, aren't you costing them money? Edit: I might be mistaken as in Canada (where I am) it's not as easy as pay what the Government says you owe, but…
That's why I don't use Mint.