This study aims to design a model to Realize Real Estate income Tax in Tabriz city with due attention to the Tax collection process. According to the related literature, the variables of "Tax payment, " "Real Estate, " "Tax evasion, " "investment incentive, " "rent and Real Estate speculation, " and "advertisement in Tax collection" are considered as key variables, affecting the conceptual model of Real Estate Tax system. According to the dynamic systems method, the interaction and relationships between variables are shown by state-flow diagrams based on the literature and experts' opinions. These relationships are finally simulated by Vensim software. The results show that advertisement has a significant effect on the amount of Taxes paid by Taxpayers. Tax transparency has also reduced rents for Taxpayers and ultimately reduced Tax evasion and timely Tax collection in the estimated budget of Real Estate resources and single-occupancy jobs. Scenarios show that lowering the Tax rate in the trading and business market and large corporations and businesses' rental income are strongly influenced by Tax revenues.

In this article, the validity of ordinary documents was examined in Real Estate transactions. Real Estate transactions without setting up an official document are important issues that happen a lot. Today, most transactions that are regulated regarding immovable property are normal, and the conflict between social Realities or registration regulations, etc. has caused many problems in the society and especially in the courts of law. According to articles 46 and 47 of the document registration law, many transfers regarding Real Estate interests must be registered. Otherwise, according to article 48 of the said law, such documents will not be accepted in any of the departments and courts. Scholars and jurists have expressed different opinions regarding the validity of ordinary documents in immovable transactions, and there is still no fixed and uniform judicial procedure between the courts. However, it seems that the courts have reached a consensus in some cases and adopted almost a fixed procedure. The interpretation of articles 46, 47, and 48 of the Real Estate Registration Law by lawyers and courts does not have the same unity, and on the other hand, the practice of courts and judges' interpretation of these articles are not the same and there are different opinions in this field.