At that point, why not just ask them to provide the equivalent of Turbo-Tax on the web and put the code on github? I mean if they are going to compete with software providers, why mess around with PDFs?

The advantage of tax software is not that it does the caculations for you, it is that it leads you through identifying what facts are important to take into consideration - eg. "Did you sell a house this year", "did you move for your job", "did you buy an electric vehicle" and so on.