Debit Note on Imported Machinery

Bhargav Dhorajiya (69 Points)

20 January 2018  
I have imported 2 machinery in August through agent of our state for which I have taken IGST credit in the same month. But I returned 1 machinery in December. In this case Agent is demanding Debit Note in his Firm Name. He is in the Same state in which my business is there. So when I issue debit note In his name the CGST and SGST is levied. Then How will I show this Debit Note in GSTR-3B of December month?