
Payment in Instalments
As per the law, the amount due as per the liability self-assessed in any return can not be paid in the instalments. Liability declared in GSTR 1 is not the liability self-assessed in return. Therefore Radha & Co. LLP can file the application in DRC-20 seeking an extension of time for the payment of taxes or any amount due under the Act or for allowing payment of such taxes or amount in installments in accordance with the provisions of section 80.

Penalty on wrong classification
If it is the case of applicability of section 73, then it is not correct to demand the penalty.
It has to be established that tax has been short-paid for any reason, other than the reason of fraud or any wilful-misstatement or suppression of facts to evade tax.

Price inclusive of tax or exclusive of tax
Here agreement value is the transaction value that is subject to tax and can not be treated as inclusive of tax.
Krishna Ltd. is liable to pay the tax on INR 10 Cr and it can not be treated as inclusive of GST.