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At the same time, all agricultural properties in the country were audited and court offices were set up to register taxes. Herodotus, an ancient Greek historian, pointed out that Darius I had divided Iran into twenty tax districts and, along with each governor, sent a tax officer to each Satrap. With the formation of the Achaemenid Empire and the expansion of Iran's geographical borders from Egypt to India, regular offices and organizations were formed to receive the country's taxes and finances. Although the exact amount of taxes collected during the Medes period is not known, it is certain that the extinction of the Medes was related to the amount of taxes collected by them. Kay Kawād, king of Kayanian dynasty, was the first king that collect taxes legally and in a certain amount (10% of income). In history of Manouchehr Pishdadi kingdom period, there are references to collecting taxes for the expenses of the troops. One of the oldest documents on taxation is the contents of Sumerian inscriptions. The importance and major role of this organization in managing the economic, financial and commercial affairs of Iran and prosperity of the private sector and direction of economic and commercial activities is undeniable.
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This organization is one of the most lucrative government organizations in Iran and has been the first depositor to the country's treasury since 2015, surpassing the National Iranian Oil Company So that in the annual budgeting, a very high percentage of the revenues of the Ministry of Economic Affairs and Finance and the current budget of the country is obtained by this organization. With the establishment of this agency, all the powers, duties, manpower, facilities and equipment of the Ministry of Economic Affairs and Finance in the Deputy of Tax Affairs and tax departments were transferred to it. In line with the implementation of Article 59 of the Third Economic, Social and Cultural Development Plan of the Islamic Republic of Iran, in order to increase the efficiency of the tax system and eliminate existing organizational barriers and also focus all matters related to taxation in a single organization, the National Tax Administration in form of a government agency was created under the supervision of the Ministry of Economic Affairs and Finance in 2002. Among the tasks of this organization are reforming and mechanizing the country's tax system and implementing Value-added tax.
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The Iranian National Tax Administration or in brief INTA is one of the organizations affiliated to the Ministry of Economic Affairs and Finance in Iran which is responsible for handling the country's tax affairs. Ministry of Economic Affairs and Finance (Iran)
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