01 December 2012
For filing Quarterly returns u need to fill up the details in an excel form , the forms are Form 26Q and 27Q., and load it in a CD., and submit it in NSDL
05 December 2012
For this TAN registaration is not needed. First prepare the details in an acceptable ETDS preparation software and give the FVU file in a CD with duly filled and signed Form27A to a TIN-FC. This is filing of ETDS quarterly return. Then next day you may regist your TAN. But now the TAN registration is discontinued in NSDL website. After it is activated you may regist your TAN. So first prepare and file ETDS return.