Tax preparation and planning software.

Tax filing web application

A visual implementation of individual U.S. taxes

A U.S. personal income tax calculator

How to Do Your Taxes for Free

converts binary PDF to JSON and text, for server-side PDF processing and command-line use. Zero dependency.

A utility to visualize individual IRS e-File returns

Python scripts for parsing IRS 990 releases in Amazon S3

Populate fillable pdf forms from csv data file

USA Federal Individual Income and Payroll Tax Microsimulation Model

Calculates federal tax liabilities from individual data under a range of policy scenarios

Calculate Federal and State US Income Taxes

The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.