Stamp on ST 3

no..... e-file is enough........ no need to file manual return now...

in case you have paid taxes offline then u may iot toi send a copy of return with xerox copies of challan so paid to service tax department for their refence, ( under stamped aknowledgement)  this is purely optional, as the department often harash the taxpayers for submitting the challan separetely, in case the payment is made electronically then u have no need to send such.