Amiri, Kiuomars, AnvaryRostamy, Ali Asghar, Ghanbari, Mehrdad, Jamshidinavid, Babak (2021). Evaluating the country's tax system by the effect of cash payments on the company's tax avoidance, taking into account the role of non-executive managers. *Journal of Development & Evolution Mnagement*, 13(44), 11-20.