Regarding GSTR 9

Dear Sir/Madam
There was an Inward Interstate supply liable under RCM during the year 2017-18, whereas payment has been made under wrong head that is CGST and SGST.
Later the discrepancy was noticed and correcting measure has been carried out by disclosing correct Tax Liability i.e. IGST while filing GSTR-3B during the FY 2018-19.
Now my query is,
Where shall i disclose the above correction in GSTR-9?
Because when i try to fill in Table 10-14 of GSTR-9 ( Transaction relating to PY 2017-18 made in FY 2018-19) it increases the Turnover whereas it is not a part of company’s turnover.
 
Your insight will be great help.
Thanking you,
Regards,
Pramod Dhungel