We wrongly filed the Export Details in GSTR1 for July 2017. therefore we are not able to get Export IGST Refund. we check with custom officials in Tuticorin, they said, you can change details in GSTR1 @ GSTN portal. There is any possible to make the changes in Form 6A in July 2017 ?. many peoples told the amendment is possible in August GSTR1, but no we search the GSTR1 return for August. there is no option is there.