Altering eligibility for the renters' tax credit; altering the calculation of and the maximum amount of the renters' tax credit for certain taxable years; altering the eligibility for and the calculation of the homeowners' tax credit for certain taxable years; making homeowners with a federal adjusted gross income greater than $300,000 ineligible for the homestead property tax credit; and applying the Act to all taxable years beginning after June 30, 2027.