In the monograph special attention is paid to the measures of state support of entrepreneurial activity in conditions of economic instability, including measures to regulate innovative entrepreneurial activity. Much attention is paid to the study of the influence of the tax policy of the state on the development of entrepreneurial activity, as well as the mechanism of forming a favorable entrepreneurial sphere in the economy of the region. The monograph offers a complex of measures in the field of tax policy of the state aimed at the development of entrepreneurial activity in modern economic conditions. The book is intended for managers and specialists of economic services of commercial enterprises, scientists, university teachers, post-graduates and students of higher educational institutions studying in economic directions, and also for all those interested in problems of development of modern entrepreneurship.