It seems that tax law would be something that lends itself well to open source. After all, what is the law but a system of logical rules not unlike software? I

It seems that tax law would be something that lends itself well to open source. After all, what is the law but a system of logical rules not unlike software? It would be great to get an open-source tax library, split into two parts. One can be the library which does the calculations, the other can be any graphical interface for users to use.