Planet Money covered tax filing a few years ago and visited it again recently: https://www.npr.org/templates/transcript/transcript.php?stor... My understanding is that the main opposition appears to be (1) the tax preparation lobby to protect their business interests and (2) anti-tax activists that believe that making people calculate their own taxes will make them more aware of how much they are paying in taxes. The…
The US has the most idiotic tax system. Your employer, your mutual funds, your 401k, your bank -- everyone reports what you make to the government. The government already knows what you owe (excluding those that itemize). They should just print out a summary and hand over a bill / refund.
In France, before this year, if you were an employee, you rarely filled a tax form, you just validated a prefilled one, usually with one click on the internet.
Now it's just taken every month from your salary, and you get a chance to correct it once a year.