A review of the week's major US international tax-related news. In this edition: US Senate approves four protocols updating the existing bilateral tax treaties with Luxembourg, Switzerland, Japan and Spain – IRS releases additional information to assist with filing and payment obligations for Section 965 transition tax on untaxed foreign earnings – G7 Finance Ministers support OECD two-pillar project to develop new rules for taxing multinational businesses – 2019 UN tax treaty negotiation manual updated to reflect changes in 2017 UN Model Treaty – APMA's functional cost diagnostic model intended to help officials with complex cases