As used in this chapter, the following terms have the meaning ascribed to them in this section, except when the context clearly indicates a different meaning:
(1) “Taxable period” means any period for which a tax return is required by law to be filed with the tax administrator.
(2) “Taxpayer” means any person, corporation, or other entity subject to any tax imposed by any law of the state of Rhode Island and payable to the state of Rhode Island and collected by the tax administrator.