Timely revised returns may correct the classification of an...

Timely revised returns may correct the classification of an already disclosed F&O loss from speculative to non-speculative business loss, with consequential recomputation of its set-off and carry-forward. Such correction does not introduce a fresh or undisclosed loss merely because it changes the loss's character and tax treatment. A revised return filed within the prescribed period must be considered, while the legal sustainability of the reclassification and the treatment of F&O transactions remain subject to independent examination. The stated approach distinguishes revisions of disclosed losses from later claims that contradict an express option exercised in the original return.