S. 147 : Reassessment-With in four years-Change of opinion-Deductions on actual payment-Outstanding Rural Development (RD) cess amount as a liability in balance sheet-Rectification proceeding was dropped-All material facts were disclosed before Assessing Officer at time of original assessment-Affirming the order of the Tribunal the Court held that the reassessment is bad in law. [S. 43B, 143(3), 148, 154]