As per transitional provisions in GST, you can claim credit reg. CST paid on stock in goods and to the extent of the amount of tax paid by you. One more condition is Bills on which credit to claim should not be beyond 1 year.Show the CST paid amt as a op.credit.
You can claim credti of the amount which would be allowed as per exisiting law as well as as per gst law. i.e. as per existing law you can’t take credit of cst, so no question of of credit of cst paid in gst regim. so you can not claim credit of cst paid. ( refer – section 140 of cgst act).