@ roshan & @ pawan
Service tax is paid on Basic Amount that is on 100 if you are not collected tax seprately then make reversed calculation of the same to get Service tax amount ..
In Above Situation you are not Collected Service tax seperately then you have to make reversed calculation to get service tax amount, As per service tax Rules Liability still has to be pay if it is not collected from party.
If Commission Amount Is Rs.100 and net paid to party is Rs.90 after deducting TDS Rs.10 (As per new notification TDS should be duducted on Value before tax.)
So you have to calculate service tax amount on Rs. 100 calculation as per below
Basic Value Rs. 89.00
Service Tax Rs. 11.00
Total Rs. 100
TDS @ 10% on Rs. 89 that is Rs. 9 so net payment will be Rs. 91.... ok i think you will be understand all queries.