I'm not sure about that 90% figure, seems a little high. 25 million people receive the earned income tax credit (i.e. they are poor), and are at high risk of a

I'm not sure about that 90% figure, seems a little high. 25 million people receive the earned income tax credit (i.e. they are poor), and are at high risk of audit https://www.propublica.org/article/irs-now-audits-poor-americans-at-about-the-same-rate-as-the-top-1-percent https://www.propublica.org/article/irs-now-audits-poor-ameri... 9 million are expats, for whom US tax filing is a special type of hell 15 million are self-employed, which means lots of extra filing https://www.bls.gov/spotlight/2016/self-employment-in-the-united-states/home.htm https://www.bls.gov/spotlight/2016/self-employment-in-the-un... putting us at circa 50M out of circa 167M returns filed https://www.irs.gov/newsroom/filing-season-statistics-for-week-ending-october-22-2021 https://www.irs.gov/newsroom/filing-season-statistics-for-we... means US tax returns are rather complicated for 30% of people before we start to consider high-income earners.