URD interstate purchase

what are the provision if we get service from a interstate transporter? as the GTA is not liable to charge GST.

I have quary, If registered transporter covered under RCM, supplying the service in inter state, what Tax would be charged in the self Invoice by the recipient, IGST or CGST and SGST.

i am registred dealer in GST can i purchases URD other State Example: ( My sales man goes to Mumbai and purchases small 2 qty to URD purchases and stock in one lorry and send me how can recived the above material?) 

can i purchases URD from within State Exp. ( I am registred in Indore and purchases material from Ratlam URD how can movment the above material can i issue our Invoice copy for Movment use.)