Provide for a child tax credit

This bill establishes a Montana child tax credit for resident taxpayers with qualifying children aged 5 or younger, providing a maximum refundable credit of $1,200 per child. The credit is reduced by $90 for every $1,000 of federal adjusted gross income exceeding $50,000, and it is not available if income surpasses a $56,000 threshold regardless of filing status. The legislation also adds this child tax credit to a list of tax credits that must be reviewed by the revenue interim committee every eight years to evaluate their effectiveness and impact. These policy changes apply to Montana income tax years beginning after December 31, 2025.