Section 80C deduction omitted from an original return cannot be...

Section 80C deduction omitted from an original return cannot be introduced through rectification of an intimation under section 143(1), because no such claim was made during return processing. Where evidence of an eligible fixed-deposit investment is available, the taxpayer may instead seek condonation to file a revised return and make the deduction claim in that return in accordance with law. The rectification claim remains unavailable, while the revised-return route is preserved subject to condonation.