A review of the week's major US international tax-related news. In this edition: US Treasury warns there may be little guidance re new corporate minimum tax and stock buyback tax before effective date – No transition period or delay in implementation date for final Section 1446(f) withholding regulations – IRS expects more penalties in transfer pricing cases – House Ways and Means Committee Republicans request Treasury retain all documents, communications re OECD BEPS 2.0 Pillar One Agreement.