Doug McHoney (PwC’s International Tax Services Global Leader) is joined by Wade Sutton, a PwC principal who leads the International Tax Team in PwC’s Washington National Tax Services Practice and previously served as Deputy International Tax Counsel at the US Department of the Treasury. Doug and Wade discuss late-2025 Treasury and IRS guidance implementing cross-border provisions in the One Big Beautiful Bill Act (OBBBA), focusing on transition and compliance mechanics that surface on 2025 returns. They walk through Notice 2025-72 (CFC year-end conformity and short-period foreign tax allocation), Notice 2025-75 (final-year coordination of the 'hot potato' rule with Section 951A(2)(B) as the regime shifts to pro rata attribution), Notice 2025-77 (a 10% foreign tax credit haircut for taxes tied to certain previously taxed distributions), and Notice 2025-78 (limits on deduction-eligible export income for certain property and IP sales). They close with downstream interactions (especially CAMT and loss/FTC limitations) and how Pillar Two 'side-by-side' dynamics may influence structuring.