In my practice knowledge I have study various assessment regarding sale-tax/vat matters. Further my opinion both option is open regarding issued C Form as Purchase date or material recd. date. At the time of assessment, it should be much clarified that we are issued the C form material recd. date or material purchase date.
One of my clients customer from Kerala has issued C Form on monthly basis, rather than quarterly. Whether can you let me know, if there is any circular regarding monthly C form in Kerala or C Form as per monthly returns filed by dealer.