It is voluntary. No one forced you to get a Social Security number. But when you did you became effectively connected to the federal tax scam. Erwin Schiff knew just enough to get himself in trouble. He didn’t understand that the way to avoid the income tax was to not sign up for Social Security benefits in the first place.
Every time you sign your 1040 under penalty of perjury and a maximum two-year sentence you do so voluntarily. But the constitution clearly states that she cannot be forced to be a witness against yourself. This is just one of the many obvious unconstitutional aspects of the income tax.
Look at the case of Alecia Pennington in Texas.
Born at home, midwife didn’t file birth certificate, homeschooled, and when she went to apply for driving license, get a job, and go to college, couldn’t do anything because she couldn’t prove she was born here.
She also probably wasn’t issued a social security number.