Tax Authority Officials Say Electronic Invoice Data Should Be Central to Cross-Checking Taxpayers' Cash Flows Through Personal Accounts and E-Wallets

At the conference “Strengthening tax administration by cash flow” held on April 9-10, 2026, Deputy Head Dang Ngoc Minh of the General Department of Taxation said that studying tax management by cash flow is an important element in reforming tax administration methods. He noted that rapid developments in digital technology, e-commerce, platform economies, and new business models are changing production, business, and consumption, and that relying only on traditional management methods based on declarations and accounting records may not fully reflect underlying economic transactions in some cases.

Electronic invoicing data as the core for cash-flow-based management

Deputy Head Dang Ngoc Minh said the Tax Department has applied electronic invoicing starting from cash registers nationwide, built a centralized database, advanced information technology applications, and strengthened data sharing with relevant ministries and organizations.

He highlighted that the deployment of electronic invoicing and cash-register-originated e-invoices—also for business households with annual revenue of 1 billion VND—is generating a growing data source. This, he said, provides a foundation for tax authorities to analyze and cross-check information and improve cash-flow-based management.

Deputy Head Dang Ngoc Minh emphasized that electronic invoice data should be placed at the center for comparison and cross-checking with other information streams, including payments through personal accounts, digital wallets, and data from delivery units, to better identify taxpayers’ actual business activities.

He also stressed that the data must meet the “True – Sufficient – Clean – Live” criteria to serve as a solid basis and an effective tool for tax administration.

Measures to address enterprises using two accounting books to evade taxes

Earlier, at a Ministry of Finance press conference in Q1/2026, the Tax Department proposed solutions to control enterprises using two accounting books to cheat on taxes. Deputy Head Le Long said that, given the situation where many enterprises set up two sets of accounting books to conceal revenue, the Tax Department issued a directive requiring organizations providing electronic invoicing solutions and value-added services for electronic transactions in the tax field to compile customer lists using accounting software and submit them to the Tax Authority.

Collecting this information, Mr. Le Long said, helps the Tax Authority understand the number of enterprises, organizations, and business households using accounting software. This supports measures to help units with tax declaration and payment and to ensure full tax obligations.

Progress on collected data

As of April 7, the Tax Department had received data from 42 organizations, including information on 12,809 customers. The Tax Department said it is continuing to coordinate nationwide to compile and update information.

Mr. Le Long added that the Tax Department will use the collected data to issue warnings and recommendations to organizations and businesses using multiple accounting books from April 2026 onward to support tax administration.

Stronger cash-flow controls and real-time data connections

The leadership said the Tax Authority will continue to strengthen strict cash-flow control, reduce cash usage, and promote data connection between the Tax Authority and the banking system, especially for high-value transactions.

They also stated they will accelerate the use of Big Data and AI to analyze risks and detect irregularities such as revenue volatility or unreasonable profit margins, moving from manual checks to data-driven monitoring.

Real-time sales data requirements for high-risk sectors

In electronic invoicing and accounting software management, the Tax Authority said it will continue to require businesses in high-risk sectors to connect sales data with the Tax Authority in real time. It will also request software providers to supply customer lists to monitor the use of multiple accounting software.