transporter

In the case of GTA under GST Act, 2017. The recipient of goods liable to pay GST under RCM. If the recipient of goods cover under any of the below mentioned category :-
 - Any factory registered under the factory
 - Any Society or co-operative society
 - Registered person
 - Body Corporate
 - Any partnership firm including LLP
 - Casual taxable person
Located in the taxable territory.
 If you are liable to pay tax under RCM than exemption limit to get registration will not be applicable.
If you are liable to pay tax under RCM than pay the tax and later on take the credit of the taxes which you are paid. 

Why there is a problem in case of interstate transportation. This is similar to within the state transport instead of charging CGST+SGST you have to charge IGST as per IGST Act, 2017.