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The Complete Guide to E-Reporting and Flux 10 for ISV

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A technical guide for software editors on e-reporting and the Flux 10 format under France's 2026 national e-invoicing reform.
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Description

This whitepaper from Iopole is a complete guide for software editors on e-reporting, the second pillar of France’s 2026 electronic invoicing reform, often less understood than e-invoicing but just as structuring for software products.

It explains what e-reporting covers: B2C transactions (POS, e-commerce, associations), international B2B operations, and certain payment data, whenever these operations have a VAT impact in France but fall outside domestic B2B e-invoicing.

The guide details the Flux 10 format and its four data blocks: 10.1 (international invoices, unitary), 10.2 (international payments, unitary), 10.3 (B2C transactions, aggregated by day/currency/type), and 10.4 (B2C payments, aggregated). It walks through recommended software architecture (collect unitary data, qualify it, attach it to the correct fiscal period, aggregate at the right moment), VAT period management, rectification flows (RE flux), and the PPF’s control and rejection logic (semantic, coherence, uniqueness, structure checks).

The guide closes with use cases by editor type (POS, e-commerce, cash-basis VAT services, international operations), product recommendations, and an FAQ.

A practical reference for any software editor that needs to structure e-reporting within its product and interface correctly with an Approved Platform (Plateforme Agréée) such as Iopole.

About the Author

IOPOLE’s API-first Iopole e-Invoicing Hub enables software vendors to deliver compliant e-invoicing and e-reporting across France and internationally, trusted by 150+ integrations and processing 150M+ documents yearly.

Through the Iopole e-Invoicing Hub, applications connect via API to Peppol-certified networks and French tax authorities, ensuring seamless regulatory compliance across domestic and international flows.
Since 2022, IOPOLE has become the trusted partner for 150+ software integrations, processing 150+ million B2B2B documents annually on a SecNumCloud sovereign infrastructure with 99.9% SLA.

As a pure-player in e-invoicing, IOPOLE focuses exclusively on infrastructure, compliance updates, and scalable technical support, allowing software vendors to expand their services quickly without competing with their core solutions. Optional 10-year legal archiving ensures secure, long-term compliance and audit readiness.

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