https://help.tallysolutions.com/docs/td9rel54/td9/getting_started_with_td9/licensing/update_license.htm

Updating Your Tally.Developer 9 License

The Update License feature is used to avail the latest license updates, new features, and so on.

To update your Tally.Developer 9 License

1. Right-click tally.developer.exe .

2. Select Run as Administrator .

3. Go to License > Update .

4. E nter the Administrator e-mail ID and Tally.NET password in the Update License screen, as shown below:

5. C lick Submit to update your license. A confirmation message appears once your license is updated.

N ote: If you are updating your site license, you can enter site administrator e-mail ID and password.

See also

Surrendering Tally.Developer 9 license

Reactivating Tally.Developer 9 license