220.21  Returns and records; regulations.--Every taxpayer liable for the tax imposed by this code shall keep such records, render such statements, make such returns and notices, and comply with such rules and regulations, as the department may from time to time prescribe. The director may require any taxpayer or class of taxpayers, by notice or by regulation, to make such returns and notices, render such statements, and keep such records as the director deems necessary to determine whether such taxpayer or taxpayers are liable for tax under this code.