Wrong input figure given in gstr 3b of December 2017

A user mistakenly entered a purchase amount of Rs. 440,000 in the Integrated Tax column instead of CGST and SGST while filing their GSTR 3B for December 2017. Despite having sufficient balances in CGST and SGST ledgers, the system is automatically adjusting outward tax liability from this incorrect figure. The user is seeking advice on how to correct this error, particularly as they haven't utilised the wrongly claimed input tax credit.