GSTR 9 filed and received ARN number also

If you have received ARN, it states that the return is filed. Kindly wait for some time, there may be some technical issue. If the same does not get updated, you may raise a grievance on the portal for the same.

Also, GSTR-9C is mandatory for those taxpayers whose turnover is more than Rs. 5 Crore. If it is so in you case, you have to compulsory file the return. If the turnover is less than Rs. 5 Crore, it is optional to file.