Actually, I saw a comment on HN a while back where someone posted a link to a github repo maintained by some government agency (maybe the CBO? but I think it wa

Actually, I saw a comment on HN a while back where someone posted a link to a github repo maintained by some government agency (maybe the CBO? but I think it was more obscure). It was a complete and up to date implementation of the US tax code! They used it to run simulations and estimate tax impact on proposals. Edit: I think it's this one: https://policyengine.github.io/policyengine-us//index.html https://policyengine.github.io/policyengine-us//index.html Edit 2: _This one_ is the actual one, policyengine just wraps this: https://taxsim.nber.org/taxsim35/ https://taxsim.nber.org/taxsim35/