An anonymous reader writes "I finally started looking at my taxes and instead of handing over my personal information and money to TurboTax I was wondering if there were any recommendations for freely available/open source tax software? Ideally, the data would be stored in a portable, open format. I wouldn't really need a GUI, but something that filled out PDF forms would be nice." It's a question that just won't go away. Open source solution or not, if you're a U.S. taxpayer, the deadline for filing is nearly to hand.