Recoil range distribution of evaporation residues formed in complete and incomplete fusion of 82.5 MeV¹²C and¹³C with¹⁸¹Ta have been measured by recoil catcher technique followed by off-line gamma-ray spectrometry. The recoil range distributions of incomplete fusion products were found to be in good agreement with that simulated on the basis of direct surface transfer reaction model. The cross-sections for complete and incomplete fusion were delineated from the measured excitation function data at the same beam energy. The fraction of incomplete fusion in the total cross-section was found to be more in the case of ¹²C than that in the case of¹³C indicating the dependence of incomplete fusion probability on the cluster structure of the projectile.