Sorry, I have incorrectly understood the question as that of travel agent.
My apologies, I stand corrected...
Pls ignore highlighted portions
Agree with Amol sir....
On the basis of gross receipts itself, there will be tax audit...
But only commission is treated as the turnover...
To identify , what is 'turnover', just see what the interest of the person is, in the transactions he carries out...... whether it is restricted to the income he generates from the agency activity.
Applicability to commission agents - If the commission agent does not sell the goods of his principal as his own and only charges commission for bringing two persons to holy marriage of sale and purchase, then he will not come within the ambit of section 44AB, except when his professional receipts exceed Rs. 10 lakhs - Abhay Kumar & Co. v. Union of India [1987] 164 ITR 148 (Raj.).
You can get a good idea of tests in determining "what is the turnover?" by seeing circular 452 of 1986.... where the person who acts only as an agent of a principal, will be treating commission as his turnover, but a person who also sells goods belonging to other than a principal, the sales will be his turnover.