The due date for filing of GSTR 9 and 9C is extended to 3rd feb for following states
Group 1: Maharashtra
Karnataka
Goa
Kerala
Tamil Nadu
Puducherry
Telangana
Andhra Pradesh
Other Territory
In these states due date of filing GSTR 9 and 9C will be 3rd Feb 2020. This due date is for returns of financial year 2017-18.
See full list:
See the full list of states where the staggered date of return is announced by CBIC.

How to create JSON for GSTR 9C?