TY JOUR TI CURRENT TRENDS AND PROBLEMS OF APPLICATION OF THE AUTOMATED SIMPLIFIED TAXATION SYSTEM (AUSN) REGIME IN THE RUSSIAN FEDERATION KW automated simplified taxation system KW ACS KW special tax regimes KW small and medium enterprises KW small business taxation KW tax reform JO Russian Journal of Management AU Suglobov, A.E. AU Minakov, A.V. PY 2026 IS 14 PB Publishing Center RIOR