Oh gee, nunya, I am saying , that I know about the Markets, the '29 crash, what FDR did in '33, as well as the history of the NYSE, the CBOE, and was correcting dreadful misinformation. Also, that NOT paying one's income taxes, lands one inb jail.
What... now I have to spoon feed you ? Wake up, dear. :-)
I will claim no expertise on this subject but I think the "voluntary" part is filing a return. Paying taxes is not voluntary. When you "voluntarily" file a return you can claim all legal deductions to lower your tax liability. However, if you choose NOT to file a return then you pay the full tab as computed by the friendly folks at the IRS.