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

Reactivating Your Tally.Developer 9 License

You need to reactivate your Tally.Developer 9 license if you have surrendered it. Reactivation could be for subsequent activation on the same computer or another computer.

To reactivate your Tally.Developer 9 License

1. Right-click tally.developer.exe .

2. Select Run as Administrator .

3. Go to License > Reactivate .

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

5. C lick Submit to reactivate. A confirmation message appears once your license is reactivated.

Note: If you are the administrator of more than one site, the Reactivate License screen displays a list of sites that can be reactivated.

See also

Surrendering Your Tally.Developer 9 license

Updating Your Tally.Developer 9