If Book Profit be. Rs.10,000. Then, the tax computed as per the provisions of MAT be Rs.1,850 (10,000*18.5%) (EC+SHEC Extra). & if such Tax i.e. MAT exceeds tax computed as per the normal provisions, then MAT shall be deemed as your tax computed as per normal provisions. However, credit of MAT is available in subsequent assessment years on the basis of Sec. 115JAA.