Your situation is very complicated. There is no way that you tax dilemma can be analyzed in an online forum like this. Further, your questions primarily seek advice on AZ tax law and AZ civil procedure. I suggest you contact an AZ tax attorney to discuss your situation.
If you need to get a determination regarding your taxes, you can file an adversary proceeding in your Chapter 7. Once you get the taxes deemed discharged by Court Order, then if the IRS continues on this track, they will clearly be in violated of your discharged under 11 USC 524.
You have an argument that the debt is discharged now and may well have a discharge violation.
If you file an adversary proceeding, it must be in the District where you filed your case.
Please contact me directly with document for a free 30 minute consultation to get more concrete advice. This is not legal advice. I don't have enough information to give actual legal advice. I can only take the limited information presented and provide a framework to know how your situation may turn out. I may have questions that bring up issues you did not think were important but make a big difference.
Assuming the obligation was discharged, the State of Arizona probably violated the discharge injunction. You need to speak with your bankruptcy attorney about whether this injunction was violated and whether you should sue the State of Arizona as a result.
Please do not rely on answers you receive from attorneys on avvo. Visit local counsel.