It return e-filed. hard copy not yet sent- want to submit revised return

Hello , I submitted my ITR online thru e-filing. I have to submit my ITR hardcopy with signature and till date have not done the same. I need to file a revised return. Question is - can I submit another return for same fy (2014-15) without submitting the hard copy of the earlier return submitted or should I send hard copy of earlier ITR V and then submit revised return ? Appreciate advise. Thanks,