S. 147 : Reassessment–With in four years-Failure to disclose material facts-Fails to challenge the reopening at the appropriate time before the Court-Not entitled to seek such indulgence, after allowing the Officer to pass the order of assessment-Writ Court cannot sit as an Appellate Authority and decide the merits of the assessment-Writ is held to be not maintainable. [S. 148, Art.226]