Where to pay previous wrongly filed GST major head

To file Form GST PMT-09, perform following steps:

1. Access the https://www.gst.gov.in/ URL. ...
2. Navigate to Services > Ledgers > Electronic Cash Ledger option.
3. Click File GST PMT-09 For Transfer of Amount option to perform intra-head or inter-head transfer of amount.
4. Electronic Cash Ledger page is displayed

Since this relates to previous FY you will have to pay correct tax CGST+SGST and claim refund if IGST.

When you will show correct position in annual return your cgst sgst liability will be more than your payment and vice versa for IGST.

That is why you will have to pay cgst sgst and claim refund of IGST.

For further queries on the matter you can mail me.