Conn. Agencies Regs. § 12-727(a)-2
(a) (1) Except as otherwise provided in this subsection, where, during a calendar year, an employer pays remuneration which is not subject to federal income tax withholding, but which is subject under federal law to informational reporting on a federal Form W-3, to an employee who is a resident individual, regardless of where the employee's services are performed, or to an employee who is a nonresident individual, where the employee's services are performed entirely or partly within Connecticut, the employer shall file a Form CT-W3, with a duplicate of the "state copy" of the federal Form W-2, with the Department on or before the last day of February of the next succeeding calendar year. Some examples of remuneration subject to such informational reporting include remuneration paid to household domestic employees, ministers or members of religious orders.
(b) (1) Except as otherwise provided in this subsection, where, during a calendar year, any person makes a payment or payments that are subject under federal law to informational reporting on a federal Form 1099-MISC to a resident individual, or, if payment or payments are made for services that were performed wholly or partly within Connecticut, to a nonresident individual, the payer shall file a Form CT-1096, with a duplicate of the "state copy" of such federal Form 1099-MISC, with the Department on or before the the last day of February of the next succeeding calendar year.
(c) (1) Except as otherwise provided in this subsection, where, during a calendar year, any person is a real estate reporting person, as defined in section 6045(e) of the Internal Revenue Code, and is subject under federal law to informational reporting on a federal Form 1099-S with respect to a real estate transaction or transactions pertaining to real estate situated in Connecticut, such person shall file a Form CT-1096, with a duplicate of the "state copy" of each federal Form 1099-S pertaining to a Connecticut real estate transaction, with the Department on or before the last day of February of the next succeeding calendar year.
(d) (1) Except as otherwise provided in this subsection, where, during a calendar year, any person receives funds from a mortgagor who is an individual with respect to a mortgage on real property situated in Connecticut, which funds are to be held in escrow for payment of property taxes on such property to a Connecticut municipality, the person receiving such funds shall file a Form CT-1096, with a duplicate of the "state copy" of federal Form 1098, with the Department on or before the last day of February of the next succeeding calendar year.
(e) (1) Except as otherwise provided in this subsection, where, during a calendar year, any person is subject under federal law to informational reporting on a federal Form W-2G with respect to payment or payments of winnings that are subject to federal income tax withholding, such person shall file a Form CT-1096, with a duplicate of the "state copy" of each federal Form W-2G pertaining to Connecticut income tax withholding under § 12-705(b)-2 of part IX, with the Department on or before the last day of February of the next succeeding calendar year.
(f) (1) Except as otherwise provided in this subsection, where, during a calendar year, any person is subject under federal law to informational reporting on a federal Form 1099-R with respect to pension or annuity payments that are subject to federal income tax withholding, such person shall file a Form CT-1096, with a duplicate of the "state copy" of each federal Form 1099-R pertaining to Connecticut income tax withholding under § 12-705(b)-3 of part IX, with the Department on or before the last day of February of the next succeeding calendar year.
(Effective November 18, 1994; Amended August 3, 2001)