In [6] and [7], we prove well-posedness of solution to the nonlinear Schrödinger equation associated to the twisted Laplacian on C n for a general class of nonlinearities including power type with subcritical case 0 ≤ α < 2 n−1 . In this paper, we consider critical case α = 2 n−1 with n ≥ 2. Our approach is based on truncation of the given nonlinearity G, which is used in [3]. We obtain solution for the truncated problem. We obtain solution to the original problem by passing to the limit.2010 Mathematics Subject Classification. Primary 42B37, Secondary 35G20, 35G25.