Brazil submits ratification of treaty law convention for states, international organisations
Brazil deposited its instrument of ratification for the 1986 Vienna Convention on the Law of Treaties between States and International Organisations or between International Organisations on 1 October 2026, the United Nations has said. Brazil
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Costa Rica proposes broader taxation of foreign-source passive income
Costa Rica published draft Bill No. 25.796 in the Official Gazette on 30 September 2026. The bill was submitted to the Legislative Assembly on 22 September 2026 and proposes a significant structural reform to Costa Rica's taxation of foreign-source
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US consults on 2027 USMCA annual joint review
The US Trade Representative (USTR) announced a formal public consultation for the 2027 USMCA Annual Joint Review on 2 October 2026, seeking written feedback and oral testimony from stakeholders on the trade agreement among the United States, Mexico,
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Dominican Republic: DGII updates ISC amounts for alcohol, tobacco
The Dominican Republic’s General Directorate of Internal Taxes (DGII) issued Resolution No. DDG-AR1-2026-00068 on 29 September 2026, setting indexed specific amounts for the Selective Consumption Tax (ISC) on cigarettes and alcoholic beverages for
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US restricts aircraft parts to China in trade standoff
The Trump administration has begun limiting aircraft component exports to China as part of a broader strategy to gain negotiating power over rare earth mineral access. The effort signals how Washington plans to use supply chain dependencies as
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US: IRS seeks volunteers for free tax preparation programmes
The US Internal Revenue Service (IRS) announced, on 1 October 2026, that it is recruiting volunteers and community organisations to help provide free tax preparation services during the upcoming filing season. Two programmes drive this effort:
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Brazil: RFB updates CSLL rules with new substance-based tax incentive simplification
The Brazilian Federal Revenue Service (RFB) announced, on 1 October 2026, the publication of Normative Instruction RFB No. 2342 on 15 September 2026. The amendment introduces two main regulatory updates. The first establishes the Globe Simplifying
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Czech Republic: Senate approves income tax treaty with Argentina
The Czech Republic Senate has approved the ratification of the income and capital tax treaty with Argentina on 30 September 2026. This agreement aims to prevent double taxation on income and capital between the two countries while addressing tax
See MoreUS: Trump Administration weighs diesel export ban amid rising fuel costs
The Trump Administration is actively considering a diesel export ban as fuel prices continue climbing across the US. President Trump stated on 30 September 2026 that conversations about blocking diesel exports happen daily, with the administration
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US: Court challenges Trump’s ‘forced labour’ tariffs
The US Court of International Trade heard arguments on 30 September 2026 over the legal validity of President Trump's global tariffs. Three federal judges examined whether the administration exceeded its authority by imposing tariffs on imports
See MoreUS considers fuel tax relief as diesel prices reach record highs
The Trump administration is evaluating regulatory changes to lower fuel prices as diesel climbs to historic levels. The federal government is considering broader use of red-dyed diesel, which would allow more buyers to bypass the federal fuel tax on
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Argentina, France: Tax treaty protocol takes effect
The amending protocol to the 1979 income and capital tax treaty between Argentina and France comes into force on 22 October 2026. Argentina and France signed the protocol on 6 December 2019 as the second amendment to the original treaty. The new
See MoreUS: IRS, Treasury proposes four-year tax payment option for qualifying farmland sales
The Department of the Treasury and the Internal Revenue Service (IRS) announced on 28 September 2026 that it unveiled proposed regulations that allow sellers of qualifying farmland to spread their tax payments across four years instead of paying
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Dominican Republic consults on simplified taxation regime
The Dominican Republic had opened a public consultation on a draft Regulation governing the Simplified Taxation Regime (RST), with the consultation beginning on 21 September 2026. The proposed regulation would update the regime for small taxpayers
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US: Court orders New York City to restart secondary home tax notices
A Staten Island court judge has directed New York City to send corrected notices to property owners in the secondary home tax case. The ruling came from Justice Wayne Ozzi of Richmond County's state Supreme Court on 29 September 2026. The judge
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Canada: PBO projects CAD 4.5 billion revenue from proposed high-income tax brackets
Canada’s Parliamentary Budget Office (PBO) released its fiscal analysis of Motion M-24 on 24 September 2026, estimating the proposed personal income tax bracket changes will generate CAD 4.5 billion in net federal revenues over five years after
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Colombia introduces temporary tax incentives for earthquake-hit areas
Colombia’s Ministry of Finance and Public Credit and the President issued Decreto No. 1413 of 17 September 2026, introducing temporary tax incentives to encourage private investment in areas affected by the August 10 earthquake. The measures
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Turkey, El Salvador sign income tax treaty
Turkey’s Ministry of Foreign Affairs announced that Turkey and El Salvador signed an income tax treaty during Foreign Minister Hakan Fidan’s participation in the 81st session of the UN General Assembly in New York, which took place from 21 to 27
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