On Monday 10 February 2021 in Brazzaville, Calixte Nganongo, Minister of Finance and Budget, launched the Single Payment Window, after the presentation and technical demonstration made by Guy Noël Londongo, Director of Information Systems (DSI) of the Ministry. The ceremony was attended by Calixte Médard Tabangoli, Managing Director of the Postal Bank of Congo (BPC), partner of the Unique Payment Window (GUD).

The Electronic Invoicing Machines Management System (MFE), presented and showcased by Ivan Stojiljkovic', Managing Director of INCODEV, a Belgrade-based international firm (Serbia), is entering its test phase. The launch ceremony took place on Monday 1 February 2021 by Calixte Nganongo, Minister of Finance and Budget, accompanied by his colleague, Ludovic Ngatsé, in charge of Budget.

Ludovic Ngatsé, Minister Delegate for the Budget, representing Calixte Nganongo, Minister of Finance and Budget, officially launched the Dematerialised Tax Stamp (TFD) on Friday 29 January 2021. 

The Minister Delegate in charge of Budget, Ludovic Ngatsé visited the modern construction sites of Mini Tax Hotels on Tuesday 12th January 2021 in Brazzaville. 

The Minister of Finance and Budget, Calixte Nganongo, followed, on Tuesday 29 September 2020 in Brazzaville, the presentation of the Electronic Invoicing Machine (MFE), made by Ivan Stojiljkovic', Managing Director of Incodev, an international firm located in Belgrade (Serbia). 

On Tuesday 22 September 2020 at the Ministry of Foreign Affairs, Cooperation and Congolese Abroad in Brazzaville, Alexis Frédéric Kanga, Director of Regulation and Litigation at the Directorate General of Taxes and Domains, launched the registration site for obtaining the new Unique Identification Number (NIU).

On Wednesday September 2, 2020, Ludovic Ngatsé, Minister Delegate in charge of the Budget, completed by Brazzaville the round of Congo's tax base services, which he had started on June 17 and 18.

Opened by Ludovic Itoua, Director General of Taxation and State Property, in the presence of Reforms and Public Accounts Adviser to the Minister Delegate in charge of the Budget, Wilfrid Ngoma Mboukou, and the Director of Information Systems, Guy Noël Londongo; the workshop on the use of the new NIU was held on Friday, August 21, 2020, in a conference room of the Ministry of Foreign Affairs in Brazzaville. The presentation on the use of the UIN platform was given by the UIN project head, the Engineer Colonel of Police, Henri Jacques Kiénaka. 

Receiving the new Central Tax Directors, during an orientation exchange organized in his office, Thursday, August 20, 2020, the Minister of Finance and Budget, Calixte Nganongo, assisted by his colleague in charge of the Budget, Ludovic Ngatsé, instructed his interlocutors to become new inspectors.

The ceremony for the handing over of instructions between the 9 incoming and outgoing Central Directors of Taxation (out of the 10 appointed by Prime Minister's Decree No. 2020-267 of August 7, 2020) took place on Wednesday, August 19, 2020, at the headquarters of the General Directorate of Taxation and State Property, and at the Large Enterprises Unit, in Brazzaville, under the chairmanship of Hermann Rodney Gouellet, Tax and Customs Adviser to the Minister of Finance and Budget, Calixte Nganongo.