alt Hacker NewsI apologize on the wording, but this is an easy thing for you to Google!
https://taxfoundation.org/data/all/federal/latest-federal-in...
I didn't look hard but that's the first thing I found. Famously, Mitt Romney complained that 47% of Americans don't contribute to federal income tax revenue, which is what I was thinking of.
Side note...I hate this stat because it makes it sound like the rich are paying their share of taxes. The reality is that people who make large w2 income pay a large part of federal taxes, and while they would be considered rich they are not the ultra-rich we see in the news every day.