S. 271(1)(c): Penalty-Concealment-Addition on account of notional rental income-Rental income-Arithmetical error-There was a shortfall in disclosing rental income-Voluntary disclosure of income to cover any omission-No concealment penalty-Appeal admitted by High Court-No penalty-Penalty order barred by limitation. [S. 245(2C), 245 D(4), 275(1)(c)]