This module provides an in‑depth overview of individual and business tax law changes introduced under the One Big Beautiful Bill Act (OBBBA), highlighting updates to tax brackets, standard deductions, credits, deductions, depreciation, and reporting thresholds. It walks through significant individual provisions such as changes to the Child Tax Credit, AMT, SALT caps, new “no tax” deductions (tips, overtime, car loan interest), senior and charitable deductions, and expanded HSA eligibility. On the business side, it covers bonus depreciation, Section 179 expansion, research and experimental expenditure rules, interest limitation updates, and various credit enhancements and expirations. The module also introduces new and updated IRS forms, including Forms 7217 and 15620, and explains recent reporting and compliance changes affecting 1099s, partnerships, and digital assets. Finally, it summarizes key recent Tax Court and Supreme Court cases—most notably Soroban Capital Partners and Sirius Solutions LLP v. Commissioner.