S. 143(3): Assessment-Limited scrutiny-Assessing Officer cannot travel beyond issue raised under limited scrutiny-Failure to obtain prior permission of Principal Commissioner for such additions-Order is bad in law-Instruction Nos. 5 Of 2016 dt.14-7-2016 and 20 of 2015, dated 29-12-2015.. [S. 45, 48, 54B, 54C,54D,54GA, 55A]