Interestingly, as more government entities adopt linux and foss in general, they have a lot more incentive to provide support for that. So maybe in a couple years these government-issued software will target linux distros.
In this case this isn't government-issued software. It's just some free(as in beer) software attached to law newspaper. They attach it each year with updated forms and formulas to calculate tax.
In Brazil, you can submit your tax return forms using applications that run on Windows, Linux and Macs. They probably run on anything with a J2SE runtime.
