Relating to tax credits; and prescribing an effective date.

Modifies definition of "business tax credit," as allowed to shareholders of S corporation, to remove Department of Revenue rulemaking authority. Updates list of eligible tax credits. Modifies tax credit allowed for employment-related dependent care expenses to conform to operation of related federal tax credit. Prescribes eligibility requirements for earned income for allowance of credit. Allows nonmarried taxpayer to claim credit. Prohibits payment of interest for refundable portion of credit. Applies to tax years beginning on or after January 1, 2018. Takes effect on 91st day following adjournment sine die.