please refer section 47(2) of the CGST 2017 for late fees Rs 100/- CGST and Rs 100/- SGST and maximum amount calculated at a quarter per cent of his turnover in State or Union Territory for late filing of Annual return .
As per Your reply "....... The late fees for not filing the GSTR 9 within the due date is Rs 100 per day, per act. That means late fees of Rs 100 under CGST & Rs 100 under SGST will be applicable in case of delay. Thus, the total liability is Rs 200 per day of default..... " there is in the word of GSTR 9. But, not GSTR-9C...!