IGST wrongly paid under CGST & SGST

File your GSTR1 correctly.

can correct this wrong head in next month by adding the tax liability of igst and reducing to the same extent in csgt and sgst respectively.

so that during annual return the net total will be same as per gstr1 in all heads

You need to pay in IGST & can claim refund from cash ledger for wrongly paid under CGST/SGST.

As per Notification 31/2019 CT, The sub-rule (13) has been inserted under Rule 87 , which states that any deposit in cash ledger can be transfer from CGST/SGST to IGST & vice versa by Form PMT 09, but this sub-rule is yet to be notified. Hence as of today you can claim refund for wrong deposit head.