Actually it was a good reply and worth taking note.

Just because 'hurr hurr derpa no free software that does all my taxes for me' isn't what you were hoping for doesn't make it useless.

They were correct. This is highly specialized software for a specific purpose operated based on state/country/province etc.
It's not something I recommend trying to cheap out on without doing the work when it comes to the government.

Keep in mind, the question basically asks 'Is there a way, I can stop paying someone else to do my taxes, and do my taxes myself, without paying anyone, but not have to do my taxes myself, and have free software do it for me'

That's like me saying, 'Is there free software that does my job for me but doesn't cost me anything and I still get paid for working'
Now, it may sound sarcastic, but if that software existed, I'd definitely be using it.

To sum it up, specializing in government revenue regulations is something unlikely to find for free that does everything related to them for you.
There's open source software like, calculators available. Even free spreadsheet software. That's all tech, which makes sense to find open source.

Tax compliance is in Federal interest, and with standard Free and Open software everyone could use the same application.

This is true but no one has yet mentioned that there IS a free (as in beer) way to do your taxes: obtain the necessary (freely available) forms, read them, understand them, and complete them. There is even phone based help if you have specific questions, as well as many books available at your local library. There, your tax forms just got filed without spending a dime! If you don't want to invest this time or don't want to take the risk of doing them incorrectly, then supposing that a free option would be satisfactory is kind of laughable. It's like (oh yes, we do love our similes) wanting seat belts in your car (oh yes, we do love our CAR similes) but not wanting to pay for them, and still wanting them to be just as safe. Surely, by now someone made something that was just as safe but was also free, right?

I think you've identified the real problem. It's not that there is no open source tax software, it's that your tax system is so complex that it requires software to file the return.

Everything you said PLUS tax software must conform to an extremely rigid release schedule, where neither dates nor functionality are negotiable at all, which is not something I've ever seen from open source.

Well, since the government defines the taxes, in the interest of its citizens the government should also provide a no frills open source (BSD or such) implementation of the tax code... Third parties could then build better interfaces (facilities to import from other sources etc) on that, while knowing that the base code complies with all the applicable rules and submits the requires end data to the IRS.

For the government to set arbitrarily complex tax rules, and then force you to pay third party suppliers to clean up the mess it forces on you is wrong.

Everyone should have a free, government supplied and transparent way of completing their taxes.

Personally i wouldn't trust a closed source package at all, since i cannot verify what its doing.

An amazing amount of ambiguity and crap in the tax code would go away if the Government were required to publish a program in Java (probably best balance of portability, capability, and specification) and that program WAS the definition of the tax code.

This would have the nice side effect of keeping lawyers who can't think formally (in the mathematical sense) away from tax law.

@pla: +1 because you are a 1%-er. ( intended as a wake up; I can't afford the 1% moniker, maybe I'm in the top 10)
    Sure, for the /. audience, the "algorithm" of following the instructions, including branches.. plugging & chugging when we fill in variables, and making an informed decision on deductibles - is all likely within our grasp.

However, look around at the rest of the country.
Most Americans cannot balance a checkbook [1], [2].

The basic tax guide "Publication 17" is over 300 pages long. [3]
The instructions for the basic 1040 form is at 100 pages [4].

Just answering the questions "What's New?", "Do I have to file", and "Where do I file" ( [4] pages 6-7) incorporate 4 more pages of tables and worksheets referenced in the text ( pp 8-11), and suggest the taxpayer review 10 separate publications for clarifications, outside the 'core' paperwork of Pub 17 and 1040 instructions.
  point: it is complex, even to "just follow the instructions". Not everyone is the sort who just jumps in, presses ON, and only looks for manuals after it doesn't work. ( I am.. but not everyone is.)

If you are lucky enough to have a job, and a mortgage, play in the stock market, and do contracting on the side.. you are a pretty smart and fairly motivated person. You can multitask. You can prioritize tasks, and see projects through to the finish.
Only 58% of the US population is employed.. or 42% is not. [5] - BLS report " population/employment ratio" .. when it comes to the word "unemployed", the US Govt needs to take a lesson from Inigo Montoya, “You keep using that word. I do not think it means what you think it means”

Never mind making educated decisions about deductions like work expenses and medical costs. I don't think the average American could fill out the typical medical insurance claim form, never mind read one and extract information for tax purposes.

How many Americans - picked "at random" - would you trust to balance your checkbook, or to fill out your tax forms?
Heck, I don't even trust a "jury of my peers" to render a sensible verdict.
Most folks I have met can't follow a 2 -page recipe in a cookbook, or remember the plot to a 200-page novel unless the movie and/or starred Heath Ledger or Megan Fox.

If every citizen was encouraged to do their own taxes, imagine how much WE taxpayers would be paying to clean that mess up?
Don't give people more credit than they deserve. Look at our last few elections.

In all fairness, they aren't the IRS' rules. They are Congress', and the IRS has the thankless task every year of trying to figure them out.

Back when I was a postdoc living in Canada I kicked a tax question about my return all the way up to the corporate HQ of H&R Block. (My mom has worked for them for ~30 years and called in some favors) The end result? They had no idea. It came down to exactly how you read one incredibly obscure clause in the thousands of pages of US tax code, and if you gave the wording to 100 people 50 of them probably would have picked one interpretation and 50 the other.

(I picked the one that zeroed out my taxes for the year. I didn't get audited.)

Steve Ryan, a lawyer for the tax-preparation industry who negotiated a deal that has the IRS promising not to set up its own Web portal for e-filing, says his argument was simple. "When the government becomes my competitor," Ryan says, "then I have every right to run an ad that says 'Big Brother is watching your keystrokes.'"

http://www.npr.org/templates/story/story.php?storyId=9112083 [npr.org] I nearly choked when I read that. "Big Brother is watching my keystrokes"?! WTF? Of course they are, that's the point. They're not just watching, they're recording every value I enter into the form, so they can keep it in a file with my name, address, and social security number on it, and then use against me in a court of law! They get the exact same information if I use TurboTax, the only difference is TurboTax gets to watch my keystrokes, too, and then charge me for the privilege.