12 October 2007
TDS is concerned only with the payment part and not the income part. So , whatever paid to the contractee should be included for TDS purpose.
So, in your case, Service Tax part is also liable for TDS
13 October 2007
TDS is deductible on the gross amount inclusive of service tax u/s 194C, 194H and 194J. There is a CBDT File note no. 275/I/2006-IT(B) dated 21.07.06 to this effect.