Conn. Gen. Stat. § 12-387b: Reciprocity.

The courts shall recognize and enforce liabilities for taxes similar to the taxes imposed by this state in this chapter and lawfully imposed by any other state, or political subdivision thereof, which extends a like comity to this state, and the duly authorized officer of any other state, or political subdivision thereof, may sue for the collection of such taxes in the courts of this state. A certificate by the Secretary of State of such other state that the officer suing for the collection of such a tax is duly authorized to collect the same shall be conclusive proof of such authority. A certificate by the Commissioner of Revenue Services that such tax of such other state or political subdivision thereof is similar to the tax imposed by this state in this chapter shall be prima facie evidence of such similarity.