What does it mean to open source this? Genuinely. Won't the irs just say, "we only accept digital filing from known providers"?
Once it became a "cloud" platform I didn't trust Intuit to keep my data private or not to use it for their own purposes. Ever since then I've done my taxes on paper. It's not difficult for someone with W2 and even self-employment income. For a more complicated situation it could be, but at that point you probably have an accountant anyway.