You can go to court and claim, righteously, that this tax is unconstitutional. You can claim, righteously, that their demand for this money is immoral. You can claim, righteously, that according to the constitution, you cannot be required to sign this income tax return. You can go up against Goliath, and you can fight him. You can also file.
Filing is, in many ways, giving in.
It doesn't necessarily mean giving up, but it means giving in, cooperating, giving the criminal what he is looking for. The third option is to flee, to simply run away. You can stand your ground. You can attempt to harm, beat up, or perhaps shoot the mugger. You can simply hand over your wallet and let him have his way with you.