https://help.tallysolutions.com/docs/ts9rel54/ts9/update_license.htm

Updating Tally.Server 9 License

You can update your license to avail enhancements and latest releases.

To update your Tally.Server 9 license

1. Click S : Manage Server in the Tally.Server 9 monitor screen.

2. Click F3 : Licensing in the Tally.Server Information screen.

3. Click U : Update License in the Startup screen, as shown below:

4. Press Enter to update the license.