Conn. Gen. Stat. § 12-264
(1949 Rev., S. 1950; 1951, S. 1112d; 1961, P.A. 604, S. 14; 1963, P.A. 2, S. 1; P.A. 73-442, S. 7; P.A. 74-329; P.A. 75-486, S. 29, 69; P.A. 76-114, S. 11, 21; P.A. 77-614, S. 139, 162, 610; P.A. 80-482, S. 20, 348; P.A. 84-458, S. 1, 2; P.A. 94-101 , S. 1 , 3 ; May Sp. Sess. P.A. 94-4 , S. 12 , 85 ; P.A. 95-114 , S. 2 , 3 , 5 ; 95-160 , S. 64 , 69 ; 95-172 , S. 1 , 2 , 4 ; 95-359 , S. 14 , 15 , 19 ; P.A. 96-205 , S. 1 , 3 ; P.A. 98-28 , S. 54 , 117 ; 98-244 , S. 13 , 35 ; P.A. 99-173 , S. 43 , 44 , 65 ; P.A. 00-174 , S. 27 , 56 , 83 ; June Sp. Sess. P.A. 01-6 , S. 21 , 85 ; May 9 Sp. Sess. P.A. 02-4 , S. 9 ; P.A. 04-180 , S. 5 , 6 ; 04-231 , S. 4 ; P.A. 05-288 , S. 214 ; P.A. 06-186 , S. 68 ; P.A. 11-80 , S. 1 ; P.A. 17-147 , S. 27 ; P.A. 18-50 , S. 11 .)
Effect of words "the principal business of which is". 90 C. 452. "Gross earnings" under former statute. Id; 131 C. 1. Corporation operating a system of dams and gates for conservation of water for benefit of lower riparian stockholders, but not owning the water, is not taxable under section. 92 Conn. 38 . Cited. 106 Conn. 580 ; 134 Conn. 299 . History of statute discussed. 150 Conn. 578 . Where plaintiff received 75 per cent of its gross earnings from furnishing steam for heat, this was its principal business and it was subject to the tax imposed by section rather than to the corporate business tax on net income imposed by Sec. 12-214 . 151 Conn. 688 . Where public utility water company which also sold produce and nursery stock claimed expenses of its orchard and nursery operations should be deducted from its gross earnings by virtue of a system of accounts prescribed by the public utilities commission, held that statute may not be modified by a regulation of the commission and the company was not entitled to such deduction. 152 Conn. 674 , 675. Amendments to uniform system of accounts after 1945 have no effect on tax base stated in statute; "gross earnings from operations" are all items contemplated by sections 600 through 615 of 1941 uniform system of accounts prescribed for electrical utilities and other receipts which fall under any of listed categories. 161 Conn. 145 . Since "transmission receipts" are not classified as "operating revenues" in the uniform system of accounts, or in any other accounts enumerated in section, they are not taxable under chapter. 169 Conn. 58 . Cited. 202 Conn. 583 . A combination of various factors, not conclusive individually, determine the "principal" business of a company. 26 Conn.Supp. 277 .
See chapter 138c re tax credits for donations to Rental Housing Assistance Trust Fund. See Secs. 12-268 d and 12-268e re failure to pay tax when due, re fraudulent returns and re penalties.