CT HB07270

Tax protests filed on or after October 1, 2025 must include specific information on a prescribed form: taxpayer identification, tax type and periods at issue, exact amounts contested, each issue with factual and legal grounds, all supporting evidence, and a sworn affirmation of accuracy

Taxpayers have 10 business days to cure incomplete protest filings; a 3-month extension is available for submitting evidence if requested at filing; failure to comply results in dismissal without consideration of merits

Commissioner of Revenue Services must track and publish annually by municipality the source of revenue from corporate business tax (Chapter 208), pass-through entity tax (Chapter 219), and personal income tax withholding (Chapter 229), beginning July 1, 2025

Amortizable bond premium subtraction for personal income tax is expanded effective January 1, 2026 to include premiums on bonds with interest taxable in Connecticut but exempt from federal tax, removing the requirement that it be attributable to a trade or business

Combined group reporting valuation allowance deduction timing is corrected to use financial statements from income years commencing on or after January 1, 2015 (but prior to January 1, 2016) instead of the 2016-2017 period