TY JOUR TI INCREASE OF ECONOMIC BENEFITS THROUGH THE INTRODUCTION OF A TAX ON PROFESSIONAL INCOME IN RUSSIA KW taxes KW experimental tax KW professional income tax (PIT) KW individual entrepreneur KW special tax regime KW economy. JO STOLYPIN ANNALS AU Toropova, I.V. AU Svetlichny, V.V. AU Yelokhina, E.V. AU Simkina, A.D. PY 2025 IS 6 PB Electronic science