Get free TCP for GSTR9C in tally. follow the link and fill your details https://gsthero.com/file-gstr-9c-using-tally-plugin/
The GSTHero is not tally partner its provide solutions regarding the GST filing and stuffs related to GST, the serial number is only to maintain records
I developed that solution, I can't share here it because it aginst the company rules so please just provide the details and get the TCP.