TLDR: Truly free tax software, even for complicated returns. Not just the 1040ez/a/etc.
I found this during tax season and will probably repost again early next year.
I don't know why this isn't more publicized. It's hard to find even if you know it exists. And I didn't see any references, links, articles, or anything talking about it. I was super skeptical at first, but the sites associated with a real tax return company (liberty tax), and sure enough my tax return actually showed up. I still don't really believe it, but it seems like the real deal.
I know lots of the electronic tax filers let you file really simple tax returns, but charge for anything remotely complicated, like itemizations or HSAs or investments, etc.
But freetax will let you actually file for free, and have a more complcated return. Last year, I itemized, has student loan interest deductions, and had some other form for my wife's HSA. And it was pretty easy, and actually free.
This year, I'll have some Betterment, tax harvested losses, some company stock program shares from my wife's company, and some small returns from Robinhood. I'll get a better idea of how it works for heavy investers like MMM'ers. It should still be free though. The other sites can charge $100 or so for this.