AMENDMENT IN GSTR 1 EXPORT DETAILS

ishan ali (na) (54 Points)

22 July 2021  
There has wrong shipping bill no. filed in Gstr 1 for the F.y 2017-18. And Consequently custom officer is not releasing my gst refund for that period. He is asking to amend shipping bill no. but there is no option to amend that details on the portal. now what to do ?