Your parents gave consent in your place the moment you were born into a state system, since that is when it's first determined whether or not you are a state's citizen, as was fully their right as your legal guardians, since you were incapable of doing so. You don't get to continue living in a state and withdraw that consent, it's one or the other.

The "government doesn't have a right to rule in the first place" argument has some, very minor, merit, but actually untangling whether or not that is the case for any one government or any particular location might involve backtracking along all of human history, as well as figuring out when and if certain, otherwise completely empty and undeveloped pieces of land were owned in the first place, so good luck with that. To use the example of Australia, what proof is there that the Aboriginals owned the entire continent before the British came along? Sure, if the Aboriginals had a camp in some location and the British came and drove them off that land, that's clear enough that the British stole that spot. But the vast majority of Australia was empty and undeveloped. Were the British supposed to just take the Aboriginals word for it that the entire continent was theirs? With no evidence or documentation of that ownership other than them saying it's theirs? They happened to be on a piece of land, so it was theirs?

Again, actually untangling whether or not a government has a legitimate right to rule the land they do, is virtually impossible, but the fact of the matter is that they've been ruling for hundreds or even thousands of years. That alone gives them at the very least the right to do so, unless you can actually prove, without a shadow of a doubt, that the land was stolen. Even if you can prove that (hah!), that would most likely invalidate any claim you have to the land as well. So you might not have to pay taxes, but you'll just have to return your house to the descendants of whomever it was that first claimed that piece of land 100000+ years ago, back when there were no governments, only tribes.

So unless you guys want to try and argue that parents can't give consent for their children (see the recent court case in India where some guy is suing his parents for him having been conceived without his consent for inspiration on that), taxation is not theft.