Voluntary Tax

The U.S. income tax system is built on the idea of voluntary compliance. This means that taxpayers are responsible for declaring all of their income, calculating their tax liability correctly, and filing a tax return on time. The IRS depends upon honest reporting. However, they conduct checks on tax reports to make sure that people file correctly. If taxpayers fail to report correct information, they may be subject to penalties.

From http://wordnet.princeton.edu/perl/webwn?s=voluntary:

http://wordnet.princeton.edu/perl/webwn?s=voluntary:

of your own free will or design; not forced or compelled; “man is a voluntary agent”; “participation was voluntary”; “voluntary manslaughter”; “voluntary generosity in times of disaster”; “voluntary social workers”; “a voluntary confession”.

From http://www.stewardshipcentre.bc.ca/green_legacies_web/resourcesGlossary.asp:

Actions taken exercising free will, without compulsion, without legal obligation, without exp.

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