My Client made Export to USA but the goods were failed in quality test, hence abroad importer rejected the goods and returned the same to India back. The Export was made with Payment of IGST and the refund was claimed and realized thereon. Now for reversal of transaction what should be the correct treatment under GSTR1 and GSTR3B , and how do I surrender back the refund claimed to the revenue authority and is there any interest appllicable on it or not?
Would be thankful to receive insights on it.