In the present work, the entropy and internal energy of a GaAs quantum pseudodot in the presence of an applied magnetic field is studied. For this purpose, the Tsallis formalism is used to obtain internal energy and entropy. It is found that entropy and internal energy are continuous function and they are zero at special temperatures. Entropy maximum increases with increasing pseudodot radius. Internal energy increases by increasing magnetic field. (c) 2013 Elsevier B.V. All rights reserved.