Anarchists often like to cite the monopoly on violence (often purposely misrepresenting the "violence" for shock value) as evidence that all states are corrupt. Yet the only difference in application between a state and anarchy is violence being a monopoly in the former, versus a free (as in unregulated) market in the latter.
That violence doesn't apply to actors who implicitly accept the fiction of the social contract, and who follow the rules. Rather, it applies, as intended, to those who don't. And this remains true within the construct of a state as well as in anarchy.
The violence implicit in taxation is targeted against people who don't pay their taxes, taxation itself is not an act of violence. The social contract, implicit as it is, does require the needs of society to be met, and the cost of enjoying the rights and protections of law in a society is paid towards the collective welfare through taxation.
Many people will say that anarchy doesn't mean there aren't rules... and fair enough, but you can't have any degree of hierarchy or social interaction without coercion, or violence in the sense that the monopoly on violence describes. There will always be bad actors, charlatans, sociopaths and psychopaths, or simply those who can't afford the burden of debt entered into voluntarily and in good faith. As soon as a rule or a contract is enforced against someone's will, then you've just implemented an ad-hoc, poorly defined subset of a state.