The exact amount doesn't matter for this, all that matters is that you vote against taxes. It is sufficient that you suspect you may owe some amount and realize that you are required to figure it out. If it's hard to figure out, that serves the purpose of those who want you to associate negative emotions with taxes so that you'll vote against taxes.
That sounds like an incentive to vote against complexity, not against taxes. Paying a larger amount doesn't make the calculation any harder to figure out, nor does paying a lesser amount make it easier.
