TSD section

Sir. our Govt organization {project} pay salary to Managing Directors and I deduct TDS u/s 94B but now some of the directors came and told me that there CA file return as professional fee and so TDS is to be deducted u/s 94J. now please advise me for the above also advice me how can I revise the 92B to 94J if I have charged TDS before wrongly.