15 November 2013
if you haven't send the ITRV, you can hold onto it and revise in manual form/physical filing.
If physical filing is not allowed for the assessee (as it is the case for certain class of assessees), you may send the ITRV. It is possible that such omission shall be considered as a defect under explanation (a) to section 139(9) and therefore AO may ask you to rectify the same. 15 days are given for such rectification.