itc claim exceed in GSTR 3B by mistake and return filled whats the solution ?

Export Clients:- While filing GST3B many people have made mistake. ie Instead of Entering in zero rated they have entered in Outward Taxable supply due to while mis-match arises.
We recommend one time revision option should be available so that people can rectify their mistake. Because of this mistake many exporters refund has been stuck.

While uploading 3B data of one of the clients , outward sales to outside maharashtra party, IGST payable amount was filled in as Rs 61714 instead of Rs 5998. Consequently Rs 55716 has been paid in excess. Advice how to claim refund or reverse it so that credit can be claimed later on