Conn. Gen. Stat. § 12-43

(b) At least thirty days before the expiration of the time for filing such declaration, the assessors shall mail blank declaration forms to each nonresident, or to such nonresident's attorney or agent having custody of the nonresident's taxable property, or send such forms electronically to such nonresident's electronic mail address or the electronic mail address of such nonresident's attorney or agent, provided such nonresident has requested, in writing, to receive such forms electronically. If the identity or mailing address of a nonresident taxpayer is not discovered until after the expiration of time for filing a declaration, the assessor shall, not later than ten days after determining the identity or mailing address, mail a declaration form to the nonresident taxpayer. Such taxpayer shall file the declaration not later than fifteen days after the date such declaration form is sent. Each nonresident taxpayer who fails to file a declaration in accordance with the provisions of this section shall be subject to the penalty provided in subsection (f) of section 12-41 .

(c) As used in this section, “nonresident” means a person who does not reside in the town in which such person's tangible personal property is located on the assessment day, or a company, corporation, limited liability company, partnership or any other type of business enterprise that does not have an established place for conducting business in such town on the assessment day.

See Sec. 12-71 re personal property subject to tax.

Section is merely directory. 30 C. 402. Personal property of nonresidents as a general rule not taxable. 47 C. 484. Cited. 123 C. 546; 145 C. 375; 147 C. 287. Applicability to nonresident corporations and discussed in relation to Sec. 12-59. 166 C. 405. Cited. 189 C. 690; 212 C. 167; Id., 639; 227 C. 826; 240 C. 192. Corporation's motor vehicles properly are assessed, for purposes of personal property taxation, in town in which the corporation maintains its principal place of business, irrespective of where its motor vehicles are actually located; nothing in section overrides the specific exemption from declaration of personal property provided by Sec. 12-41(b). 266 C. 706.

Cited. 29 CS 125.