Do you know if anyone has ever sued to either not pay taxes while not allowed to vote, or to be allowed to vote? Ye olde "no taxation without representation"?
1. Declaration of Independence versus Constitution. Not the same in terms of legal weight.
2. You're implicitly combining "representation" with "voting." The writers of the Declaration of Independence believed (even if we dislike it today) that those are separate. You can tell because all their wives and daughters were still prohibited from voting for generations.
3. If what you're suggesting applied, then wouldn't that mean everybody who hasn't registered to vote, or noncitizens and those under 18--are all exempt from sales tax and income tax?
Why would they sue to not pay taxes? They make no money that would qualify as taxable, so they would owe no taxes on income not earned. Even people working part time on very low wages can make so little they do not owe. They still have to file though. Never considered if inmates have to file each year or not
someone serving time is going to be worried about vehicle registration and insurance? just claim it as "off road" with the state since it's obvious you will not be driving it. no need for insurance on a car that's not being driven. property tax might be an issue, but I seriously doubt it's a large percentage of inmates that need to consider it. all in all, nice stretch, but off topic really