Condonation of delay in filing returns when mercantile interest accounting is negated by bank TDS at maturity. Condonation of delay in filing returns is allowed where an investor in Government savings taxable bonds opted for cumulative interest on maturity but accounted interest on a mercantile basis and the intermediary bank deducted tax at source on the entire interest at maturity without apportioning accrued interest/TDS across financial years; other conditions of the relevant CBDT instruction continue to apply.