Dear Indu,
While posting the entry thro' FB60 the expenditure here the Rent a/c is debited and the Service vendor is Credited. in the Withholding tax tab select the relevant tax code say 1% or 2% as the case may be. Now the system itself will calculate TDS and adjust the payment to the vendor. WHT entries are automatic entries and need not be entered by the user. hope this clear your doubt. n.selvakumar.