Failure to apply tan

Nisha Yadav (Accounts exe) (455 Points)

06 March 2013  
Dear All Good morning, We applied Tan no in month of Feb'13.Now problem is that should we deduct tds on those bill which received before feb'13 or no need to deduct tds on those bill ???????? n if need then what we have to paid, intrest or penlty or both ?? Please help me. Thanks