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                   490 Points
                   Joined May 2010
                
               
			  
			  
             
            
             From the captioned issue, we presume that since the material is found defective, the same is not send back to the suppliers premises, Hence, no E-way bill shall be required. 
However, your raising the Debit Note shall not help as per GST compliance. It is on the Supplier to raise a Credit Note with reference to the Original Invoice raised and upload the same in its GST Return. Your Debit Note can then follow as a supporting.
In the above, case if the material had moved from your premises to the supplier, it was the Supplier who should have raised E-waybill for Sales Return option availabel in the waubill portal window and moved the material on the basis of such Credit Note raised by him.