I wanted to be able to easily compute my tax return using simple open-source software and be able to trust that it was correct. So I'm building that software, with a goal of keeping it simple to add and maintain tax forms/logic so that portion can be crowdsourced.

At its core, HabuTax, is a very simple dependency solver. The tax logic is modular and specified at line-level granularity (one formula per line per tax form). This means there is less to keep in your head when implementing, since each field must only consider its own inputs and output, making it easier and less error-prone.

I would love your help, whether that is trying it out and reporting bugs/suggesting improvements, implementing additional forms or adding support for more scenarios, or submitting anonymous tax data to help build a test suite.

Thanks!