This is definitely a nuanced issue, and some people in this thread are being alarmist. Another legitimate issue that many people cite is that by creating a system whereby people can just click a button to pay their taxes is that it can cause people to pay more taxes in general by not fighting for every deduction that they can. People are complacent, and if they are told by the government that they owe some dollar figure, the great majority of people will just click the button and put in their bank account info to make the problem go away.

Say what you will about the greed of tax companies, there absolutely is merit in those arguments. However, there is also something to be said for the effect of large numbers of people being lazy and not fighting to keep every dollar they are entitled to.