This bill proposes significant updates to Arizona's taxation statutes by repealing certain sections, including sections 20-224.03, 41-1507, and 41-1525, which currently provide for specific premium tax credits and related provisions. It amends section 20-224 to remove references to the repealed sections and clarify eligibility for premium tax credits. The bill also modifies tax rates and caps on public infrastructure funding, increasing the maximum amounts that can be distributed to local governments. Additionally, it introduces new definitions and requirements for income calculations related to tax exemptions for veterans and their surviving spouses, streamlining the process for claiming these exemptions. Moreover, the bill updates income tax calculations and deductions by introducing provisions for the treatment of various payments, modifying the definition of "internal revenue code" to reflect the code as of January 1, 2026, and increasing standard deduction amounts for different filing statuses. It also repeals certain sections of existing law and adjusts rules surrounding tax credits, including the treatment of basic research payments. The bill reduces the aggregate limit for tax credits from $135,000,000 to $110,000,000 for fiscal year 2026-2027 and beyond, mandates that a minimum of 80% of grants must support projects generating transaction privilege tax revenues, and establishes an unemployment insurance operating fund with specific guidelines. Overall, these changes aim to modernize tax provisions, enhance taxpayer benefits, and ensure effective fiscal management.