Revenue and taxation; income tax; Oklahoma adjusted gross income; deduction; qualified tips; effective date.

HB 3377 amends Oklahoma's income tax code to adjust how net operating losses (NOLs) are calculated and carried forward or back for tax years. It specifically changes the rules for businesses and individuals claiming NOL deductions, setting different treatment based on the tax year's start date (pre-2001, 2001-2007, or post-2008). The bill requires Oklahoma taxpayers to calculate NOLs separately from federal rules in some cases, while aligning others more closely with federal Internal Revenue Code Section 172. This directly affects businesses and individuals who utilize NOL deductions to offset taxable income in Oklahoma.