THE ECONOMIC GROWTH AND DEVELOPMENT OF ISLAMIC GOVERNMENT INCREASES THE PUBLIC EXPENDITURES. IN ORDER TO OVERCOME AND REDUCE THE PRIMARY DEFICIT, EXPANSION OF ISLAMIC TAXES (ZAKAT, KHUMS, …) OR NEW AND MODERN TAXATION ARE SUGGESTED. THUS, IN ISLAMIC SOCIETY, THERE ARE MUTUAL RIGHTS AND OBLIGATION BETWEEN NATION AND GOVERNMENT.IN THIS REGARD, SOME IMPORTANT QUESTIONS RAISED HERE: DESPITE THE EXISTENCE OF ZAKAT AND KHUMS (ONE FIFTH OF GAIN), IS THE ISLAMIC GOVERNMENT AUTHORIZED TO RECEIVE OTHER TAXES? IS A TYPICAL CITIZEN IN ISLAMIC COUNTRY REQUIRED TO PAY MODERN TAXES IN ADDITION TO ZAKAT AND KHUMS? CAN ZAKAT AND KHUMS BE CALLED TAXES? IN THE CURRENT ARTICLE IT HAS BEEN TRIED TO ANSWER THE QUESTIONS. THE AUTHORITY AND LEGITIMACY TO PASS TAX RULES AND REGULATIONS IS ONE THE SOVEREIGN RIGHTS OF THE ISLAMIC GOVERNMENT. THE CONCEPT OF COMMON INTERESTS JUSTIFIES THE RIGHT BASED ON ISLAMIC JURISPRUDENCE. THEREFORE, CREATING OFFICIAL TAXES, BASED ON ISLAMIC JURISPRUDENCE LEGAL SUPPORT, IS THE RIGHT OF THE ISLAMIC SOVEREIGNTY AND GUARANTEES PROGRESS IN ALL ASPECTS OF ISLAMIC SOCIETY.