Conn. Gen. Stat. § 38a-1011: Taxes.

Each workers' compensation self-insurance group, as defined in section 38a-1001, shall pay a tax to the Commissioner of Revenue Services for the calendar year commencing on January 1, 1997, and annually thereafter, at the rate of one and three-quarters per cent of the total net premium received on any new or renewal contract or policy by such group during each such calendar year, which shall be in addition to any other payment required under sections 31-345, 31-354 and 38a-48. The provisions of chapter 207 pertaining to the filing of returns, declarations, installment payments, assessments and collection of taxes, penalties, administrative hearings and appeals imposed on domestic insurance companies shall apply with respect to the charge imposed under this section.