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!!!
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 in turn the system does let you login to view your (bigger company) tax forms, your last return results; other relevant forms haven't been too hard for me to get ahold of digitally. Digital deposits are quick and there's multiple competing Windows and web-based clients that are both free (not just for low incomes) and certified as compatible by the CRA for each year's tax season. This has pushed more than one company to offer their products free or at a discount, but I actually really like one of the Windows clients so I'll use it next time.
That's why I don't use Mint.