U cannot c/f losses for A.Y 14-15 but u cn c/f losses of A.Y 13-14 as the return for that A.Y was filed on time.
Also losses under house prop cn be c/f for current A.Y i.e 14-15 even if return is filed late
Yes carry forward of losses is allowed if the return is filed within the due date of which assessment year loss is being carried forward & allowed to set off in nextyear even Iif the return is not filed within the due date.