In my Opinion you can not carry forward the loss!!!!
Read Sec 139(3). Loss Return
As per Sec 139(3), Any person who has systained loss under the head " Profit And Gain of Business" or " Capital Gain" in any previous year and claims that such loss should be carry forward under sc 72,73,74 or 74A shall furnish a return of loss within the time allowed u/s 139(1).Any return so filled under this section shall be treated as a return filed u/s 139(1) and all provision of the act shall apply accordingly.
Hence you need to file your return within time allowed u/s 139(1) which is 31st july.
However you can file belated return, In that case the assessee may seek remady by making an application to CBDT for relaxation of time to carry forward the loss for setoff.Circular No 8/2001 dated 16.05.2001