The due date of GSTR-9 is October 31 every year. However, the scheduled date for GSTR-9
filing can be altered or extended as per the ongoing notifications from Government of
India.
No, GSTR-9 details cannot be revised once it is Filed.
In case of a delay, the individual is needed to pay Rs 200/day (CGST Rs 100 + SGST Rs
100). Along with that, a fine has to be paid with an 18% per annum rate.
If the liability arises after filing GSTR-9 or any discrepancies regarding the Input Tax
Credit then the registered dealer should be paid the amount to the GST department with
the help of DRC-03 challan.