notice under 142(1)

i go this not for the FY 2015-16.

they ask to provide below things.
1) a brief note on the nature of activities under taken in the previous year relevant to the AY 2016-17 and the status of the activities undertaken in the earlier years.

(2) please furnish detailed computation of total income for the year under consideration along with evidences of source of income thereof.

My it return for the AY2016-17 is of Gross 295160/-, 259460/-
in computation comprehensive. detail shown 595000/- other income of brokerage.

I have deposited cash in total 3 bank account is about 12 lac.

now please tell me what they want...?
what can I do...?


Thanks