GST related query.......

E commerce operator collect Tcs (gst) of a supplier and filed GSTR 8 return.But while filing the return,amount of Tcs has been entered excess against supplier GST No. by mistake.

Supplier also accept the excess tcs in his portal login and the same has been credited in his Electronic cash ledger.

Now e commerce operator saying that because of supplier already accepted the tcs amount,amendent cannot be made by him. So they are demanding excess amount of tcs in cash from supplier to compensate the same.

Query:

1) whether e commerce operator still make amendment in return to rectify the same.

2) whether supplier should re-imburse the excess tcs in cash to e commerce collector

3) whether there is any possibility of demand in following years due to excess tcs accepted by supplier