The Peppol network will enforce a mandatory switch from G2 to G3 digital certificates on 1 April 2026. Failure to migrate will revoke the G2 trust chain and disconnect Access Points from the network. OpenPeppol has issued detailed guidelines to help providers become dual‑capable during the transition.

Poland's KSeF e-invoicing system requires all VAT‑registered businesses to submit B2B invoices via a centralized platform using the FA(3) XML format. Large taxpayers must comply from February 2026, others from April 2026, with a grace period through 2026 and penalties starting in 2027. The system assigns unique identifiers, stores invoices for ten years, and imposes up to 100 % VAT penalties for non‑compliance after the grace period.

The blog explains how embedding tax automation into marketplace platforms can unlock revenue, reduce risk, and support compliance across multiple jurisdictions. It outlines platform reporting obligations in the EU (DAC7), UK, Mexico, Canada, Australia, and other countries, and highlights the benefits of integrated tax services for sellers and platform operators.

The EU will eliminate the €150 customs and VAT threshold for low‑value consignments from March 2028, making e‑commerce platforms the de‑emed importers responsible for all duties and VAT. A single EU Customs Authority and a Customs Data Hub will be established to centralise and simplify customs procedures, with the new regime expected to raise €1 billion in revenue annually.

On 8 October 2025, Irish Revenue released a roadmap for implementing the EU's ViDA e‑invoicing and real‑time reporting requirements. The plan phases the rollout, with large corporates required to adopt the system in November 2028, all VAT‑registered businesses in intra‑EU B2B trade by November 2029, and full compliance for all cross‑border EU B2B transactions by 1 July 2030. The definition of a large corporate was clarified on 10 February 2026.

Brazil's new IBS/CBS/IS tax system now treats advance payments as taxable events, requiring businesses to issue a Debit Invoice (NF-e type 06) and report tax in the payment period. The final invoice must reference the advance payments via <gPagAntecipado> to offset tax already paid and avoid double taxation. ERP systems must support advance-payment tracking and the new invoicing requirements.

Greek authorities have postponed the mandatory B2B e‑invoicing go‑live to 2 March 2026, with a two‑month soft‑launch ending in early May. The first wave targets resident large businesses (turnover €1 million+) and covers domestic B2B supplies and exports outside the EU, while EU B2B remains optional. Penalties for non‑compliance include VAT‑based fines and fixed €500/€1,000 penalties, and businesses must submit a commencement declaration to AADE before issuing e‑invoices.

Argentina’s tax authority has introduced a new legislative framework that expands mandatory e‑invoicing to additional sectors and introduces a monthly electronic settlement system. The changes, effective 1 July 2026, also link point‑of‑sale terminals to specific economic activities and feed invoicing data into pre‑filled returns for Simplified Tax Regime taxpayers.

The article explains how indirect tax compliance has evolved from a SaaS-like model to an infrastructure layer, driven by regulatory changes such as e‑invoicing mandates that embed compliance into transactional workflows. It highlights the shift toward networked operating layers, with platforms focusing on connectivity, interoperability, and real‑time regulatory interaction rather than just calculation and filing. The piece notes that regulatory velocity and mandate rollouts are now key drivers of platform selection and market dynamics.

On 13 February 2026 CEN approved updates to EN 16931‑1, modernising the standard for B2B e‑invoicing and ViDA‑driven reporting across the EU. The revision adds mandatory fields such as IBAN details, early‑payment discount and late‑payment charge indicators, and clarifies syntax bindings to UBL and UN/CEFACT CII, requiring businesses to adapt validation and mapping processes for automated compliance.