Conn. Gen. Stat. § 7-567

If during any fiscal year any municipality determines that it has failed to levy necessary taxes or to levy a tax which, in addition to all other estimated yearly income of such municipality is sufficient to pay the current expenses of such municipality for such fiscal year, the board with the powers to levy taxes for such municipality may levy a tax or additional tax upon its grand list applicable for such fiscal year for the amount sufficient to pay its current year's expenses and determine the due date of such tax levy.