Modern monetary theory describes taxes as primarily tools to reduce some effects of income inequality (and that is not done anymore) and, most importantly, provide the value of money. In essence, taxes (and the threat of imprisonment if you do not pay them) is what makes paper, and now numbers on computers, a thing you will die without.
A primary human right is you own the fruits of your labor. Period.
(Might as well claim that the government's income collected through taxes is the fruits of the government's labor.)
But I’ll add that claiming you have to work for free for part of the year is a silly way of looking at at. You’re never forced to work for free for even a single hour! You just have to pay a fixed percentage of your hourly wage in taxes, an arrangement which has been in place across every developed country for many decades.