Fantastic job making taxsim more accessible! We've built an open-source version of taxsim called OpenFisca US [1] which we expose in our (also open-source) web app, PolicyEngine US [2]. We haven't yet implemented all of taxsim—we only have the most recent couple of years, and not all states—but we have some advantages like implementing means-tested benefits and being able to simulate custom tax and benefit reforms, both on individuals and the population (e.g. the budgetary and poverty impacts).

I'd love to get in touch. Will email you from [email protected].

[1] https://github.com/policyengine/openfisca-us

[2] https://policyengine.org/us