Section 12-39z - Rounding of dollar amounts in returns, statements or other documents(a) The Commissioner of Revenue Services may require, with respect to any amount required to be shown on a form prescribed for any return, statement or other document required to be filed with the commissioner under authority of any provision of the general statutes, that if such amount of such item is other than a whole-dollar amount, either (1) the fractional part of a dollar shall be disregarded; or (2) the fractional part of a dollar shall be disregarded unless it amounts to one-half dollar or more, in which case the amount, determined without regard to the fractional part of a dollar, shall be increased by one dollar.(b) The provisions of subsection (a) of this section shall not be applicable to items which are required to be taken into account in making the computations necessary to determine the amount required to be shown on a form, but shall be applicable only to such final amount.Conn. Gen. Stat. § 12-39z