S. 147 : Reassessment-After the expiry of four years-Income from lease rental-Reassessment based on documents accompanying return of income-No new material discovered-Reassessment is bad in law-With in four years-Reassessment based on discrepancies noted in value of land and doubtful debts in the statement of the computation of income and financials-Reassessment is held to be valid. [S. 36(1)(viia), 69A, 148, Art. 226]