GST  Practitioner &  Accounts 
                
                   15022 Points
                   Joined March 2014
                
               
			  
			  
             
            
             You Can Claim refund of in case Inverted Duty Structure with certain conditions and  restrictions , as per section 54(3) of the CGST Act , and rule 89(5) of the CGST rules , ( please refer) , you also refer Circular issued by CBDT , time to time in this regards , along with Case laws . If you are eligible then you Can apply for refund. 
Take more Opinion as well.