This is probably the least crazy sovereign citizen crap. It is perfectly legal to not have your employer withhold taxes. But at the end of the year, or quarter, you’re going to have to pay them.

I know lots of smart people that do this because “I’m not letting uncle sam get an interest free loan for a year”. Which, to be fair, is a reasonable statement assuming you have the good financial sense to know what your actual withholdings need to be and pay them come tax day.