Hart's answer is pretty unremarkable except for affirmative defense 5:
The claims of the United States is barred as the 90 day letter (Notice of Deficiency) was served in violation of Idaho Constitutional Article III, Section 7 which bars Senators and representatives of Idaho from being served during the session of the legislature.
It appears that Hart is claiming that he is immune from service of
federal process as a state legislator, so long as the service is attempted during a legislative session. Sorry, Phil, federal law determines the propriety of federal process, not state law. And, whatever Idaho law, federal law provides legislative immunity only for legislative acts.
Bogan v. Scott-Harris, 523 U.S. 44 (1998). Is it your position, Phil, that not paying income taxes is somehow a legislative act?
Yet another cheat who believes himself sufficiently special so as to be immune to things the rest of us are not.