Taxes3 min read · Updated: 5 November 2026

Digital tax administration: how did the e-invoice and "Tax Administration 3.0" come about?

From the paper tax return to the e-invoice checked in real time. The newest stage in the history of taxation, Italy's experience and the OECD concept in short key points.

In ancient Egypt the tax scribe saw the harvest with his own eyes and wrote it down. In the 21st century the "scribe" has become a server: as soon as an invoice is issued, the tax authority sees it.

  • The problem. The VAT chain relies on invoices. A paper invoice is easy to forge or hide, while checking it is slow and expensive.
  • The idea of the solution. The invoice is sent from the seller to the buyer not directly but through a state platform. The platform registers it and the tax authority sees the data immediately.
  • Italy's experience. Italy was one of the first in Europe to make electronic invoicing between businesses (B2B) mandatory: from 1 January 2019 invoices pass through the tax agency's SdI (Sistema di Interscambio) platform. The main aim was to reduce tax evasion.
  • Step by step. In Italy, before the B2B obligation, e-invoicing was tried out in public procurement (B2G).
  • The OECD concept. On 8 December 2020 the OECD Forum on Tax Administration published the "Tax Administration 3.0" report. It says that, over time, paying taxes should become a "seamless and frictionless" process that is built into businesses' ordinary systems.
  • A long road. The report itself stresses that this change is a journey of many years and that many pieces have to fit together.
  • What it means for the accountant. An invoice is no longer just an internal document but data shared with the tax authority. There is less room for "I'll fix the mistake later", so checking before the invoice is signed becomes more important.

The 1980s, the 2000s and today: how has tax administration changed? The OECD divides this road into three stages: the paper era, electronic administration ("Tax Administration 2.0") and digital transformation ("3.0"). The table below shows the general direction; the exact years differ in each country.

Process1980s2000sToday
Tax returnA paper form, filled in and submitted by handElectronic filing via the internet becomes widespreadElectronic filing is the norm; in many countries part of the data is pre-filled
InvoicePaper, in both parties' archivesE-invoicing voluntary or as a pilotMandatory through a state platform in a number of countries
Retail receiptA simple cash register or a handwritten receiptCash registers become computerisedIn some countries online cash registers: receipt data is sent to the tax authority automatically
AuditLeafing through documents by handSelective checks on a computerAutomatic data matching and risk analysis
The accountant's main jobWriting, calculating, copyingEntering data in software and producing reportsControlling data quality and analysis

Example (prepared by the author, hypothetical). The "Navro'z Mebel" company sold a table to a shop and issued an invoice. In the paper era this invoice might have been looked at months later, during an audit. On an electronic platform it is registered as soon as it is sent: the shop confirms or rejects it, and the tax authority can match the data of both parties. If the company "forgets" to include the invoice in its return, the mismatch shows up automatically.

See also

Sources

  1. European Commission: eInvoicing in Italy · the B2B e-invoicing obligation from 1 January 2019, the SdI system
  2. EY Global Tax News: Italian budget law introduces mandatory e-invoicing
  3. OECD: Tax Administration 3.0: The Digital Transformation of Tax Administration (2020) · published on 8 December 2020; the idea of making taxation a "seamless and frictionless" process
  4. Example · prepared by the author, hypothetical

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