We have wrongly filed GSTR3B for the month of July-17 & Aug-17. We wrongly mentioned IGST against export amount under table 3.1(A) i.e. Outward taxable supply (other than zero rated, nil rated and exempted) instead of table 3.1(B) i.e. Outward Taxable Supply (Zero Rated).
Hence, our refund against IGST paid on exports has been stuck up. Refund can not be processed until GSTR3B and GSTR1 data matches. So, what can be done in this case?