Can we take input of GST for RCM output paid now on Freight for FY 2017-18, 19-20 and 20-21? RCM is in itself pay output and take input, RIght? We can pay Interest alone on the same for delay of depositing RCM output and take input now in 3B for RCM of 17-18, 18-19 or 19-20??