Hi Chintan,
The details asked for are normally called during the initiation of assessment proceedings i.e under the cover of Notice u/s 143(1). Generally the notice to initiate assessment proceedings is accompanied by notice u/s 142(1) to call for records.
The assessment is usually done in line with previous assessment completed for past assessment years.
1. Working of Interest u/s 201(1A)
With these details the AO will scrutnise the correctness of the calculation.
For all TDS short payments/ deducted and not deposited an interest of 1% pm shall be levied.
2. Opening / closing stock quantity, value and the working of rates of the stock.
With the above said details the AO will scrutnise for under valuation of closing stock.
3. Details of Reserves and surplus and the purpose of the same.
The AO will ask for nature of reserves.
4. Proof of 15G / 15H collected from depositors and proof submitted with concerned CIT office for verification.
The above mentioned forms are submitted as a declaration claiming the receipt of dividend without the payment of tax.
The AO will scrutinize the investments shown as per the return in line with those as stated in declaration.
It seems that the same details are being asked for in the past assessment proceedings too. Before proceeding any further it would be better to first check the records of past assessment proceedings.