Given how much H&R Block and Intuit have unethically and corruptly leeched from the government and the taxpayers directly, I think the should literally be nationalized and have their tax software platforms absorbed into the IRS. Their company activities over the last few decades are so flagrantly, indisputably bad for the country. There's literally no upside, none at all. They have intentionally sabotaged tax filing…
Political note: calls for nationalisation, in American politics, is a gift to the other side. It lets one paint the opposition as extremists without grounding in U.S. Constitutional law or the economic history of countries that regularly expropriate property.
I get the impulse. But literally any other phrasing—massive fines, criminal prosecution, open-licensing requirements, et cetera—is more productive for any aim other than blowing steam.