RCM on Sale?

I think you are traders and received transpotation services from GTA. in such case when you pay freight to GTA then RCM liability fall on you. but when u send your matarials to your client 1st think we should know who will paid freight charges to GTA. if u paid then u r liable to pay tax as RCM but if you client will paid freight to liability fall on him RCM basis

The person who is availing the services of GTA is liable pay Under RCM .(Subject to conditions prescribed in Notification 13/2017 CT )

IN GSTR1 which column RCM Have to show. if transporter not have GST regitration

In that case you should fill transporter's PAN in your gstr 1

ITS INWARD SUPPLY SO NO NEED TO REPORT IN GSTr 1, (GSTr is for outward supply)

Yes gstr 1 is for the inward supply