A lot of things are legal and still not moral.
Not a direct answer, but good enough for my purposes. You've stated that legality does not confer morality, which is all the answer I need.
No, I did not state that. You took it out of context and invented your own meaning. You fail logic as well.
We've now ruled out legality, voting, costumes, and benefits. Is it perhaps simply the names? If I call myself the government, and call it a tax when I steal from you, does that make it moral?
No, it would be illegal. Please read out loud:
Breaking the law is immoral. I have clearly stated that many times now.
Property is not immoral and not illegal. When you live on a country's land, you have to obey the laws of that country. Is my opinion so hard to understand for you? If those laws includes one that says you have to pay tax, then you have to pay tax. It is not theft, it is not immoral, it is a matter of property rights. You may think you own a property, but owning a property in the context of the laws in a country will only give you certain rights over that property. The property is still a part of the country, and it's laws still apply. New countries show up all the time, and there are still unclaimed areas on Earth. You are free to start your own country and exercise your exclusive property rights there if you wish.
If you own my house, you may demand rent. And because you are a commie, you will probably call that theft. In my opinion it is not. It is moral and legal.