I still do my taxes manually. I've looked for open-source software to assist. I've tried OpenTaxSolver, it is OK for what it does (basic 1040 and a few schedule

I still do my taxes manually. I've looked for open-source software to assist. I've tried OpenTaxSolver, it is OK for what it does (basic 1040 and a few schedules like SE income and Schedule C). It does not come close to handling all possible scenarios. It's possible that you could write your own modules to handle any mising forms, in fact I tweaked one calculation that wasn't handling some edge case properly. But that's more than most people would want to do, and would certainly be more work than just doing those forms manually with pen and calculator. But like any open-source project, it relies on individual efforts like that to build something that's useful to more people. The UI itself is extremely minimalist and would not be regarded as "user friendly" by a user from the general public. Edit: it also only attempts a few state returns. Mine is not one of them, but fortunately in my state the tax forms are pretty easy assuming the Federal return is done.