How to build an e-reporting system that holds in production

A reliable e-reporting system is not built from the output format. It is built from the source data.

Unit-level collection

Every transaction and every payment receipt is captured individually from the software, whether it is a POS, an e-commerce platform or an ERP. The unit-level detail must be preserved even when the final transmission is aggregated.

Regulatory qualification

Before any aggregation, each data point must be qualified: operation type (B2C, international B2B), declarant role (seller or buyer), applicable VAT regime. This step determines which block the flow will be produced in and which fiscal period it will be assigned to.

Fiscal period assignment

The declarant's VAT regime directly conditions transmission deadlines and frequency. Monthly normal regime, quarterly normal regime, simplified regime, VAT exemption: each case has its own rules. Your software must know this parameter for each declaring client.

Aggregation at the right moment

Consolidation happens last, once the data has been qualified and period-assigned. This sequence is the only one that allows precise corrective flows to be produced without reconstructing the entire submission set in case of error. Certified platforms can offer aggregation services from unit-level records. Determining what your partner covers and what your software must handle upstream is a structuring product decision.