TY JOUR TI Some features of the fight against tax evasion KW tax policy KW self-employed tax KW entrepreneurial activity KW taxes and fees KW tax system KW tax avoidance JO The Economy under Guard AU Shevko, N.R. AU Hadiullina, G.N. PY 2020 IS 2020 PB Nizhny Novgorod Academy of the Ministry of the Interior of Russia