07 December 2013
CST purchases are to be claimed in the month they are received in the respective returns.ITC is not eligible on these purchases,but,delay in declaring interstate purchases in time in returns may create problems in getting E1,E2, and C forms on line and giving them to the sellers in time. If the forms are delayed then the sellers have to pay full tax on such sales,which will be recovered from you.So,within three months/quarter it must be declared in the returns....mjk