Yes Ankita you have to do the supplementary. Refer the 1st answer to your quesry which gives correct answer.
All amendments upto 30.4.2016 are applicable and you need to only concentrate on this. So to cover these amendments specifically, you should read.
1.Supplementary for A.Y.16-17
2.RTP issued for May and Nov.16 to cover all amendments properly.
But if you are using a book that is latest (say Bangar for IDT) then it automatically covers and highlights the amendments to be applicable upto May 2016 attempt and and you just need to refer the RTP for Nov.16. Supplementary in this scenario, can be used to solidify the points missed during study of reference book like Bangar.
Also supplementary is much more useful if you have covered the topics first in which amendments have been made.
@ Manasi. Provisions included after 30/04/2016 are not relevant hence answer the questions as per the amendments introduced upto 30/04/2016 but sometimes there might be a confusion in this regard as institute for some reason may avoid including certain amendment and in that case as well, you should answer only on the basis of amendments specified in supplementary and RTP.