Vt. Stat. tit. 32 § 8553
Such tax shall be based upon the business of such company, association, or society during the year terminating with December 31 preceding. It shall be paid quarterly on or before the last day of the second calendar month following the quarter ending the last day of March, June, September, and December of each calendar year and shall be computed either upon the business of such company, association, or society during the quarter for which the payment is made or upon an estimated basis predicated upon prior years business, upon forms to be prescribed by the Commissioner of Taxes. Where the aggregate tax imposed upon a company, association, or society is reasonably expected to be less than $500.00 for the calendar year, it may be paid on an annual basis not later than the last day of February following the close of the year. Such company, association, or society shall annually make a final reconciliation return on or before the last day of February in the manner provided in section 8123 of this title.
32 V.S.A. § 8553