https://help.tallysolutions.com/docs/te9rel60/Licensing/Update_License_default.htm

Updating Your Tally.ERP 9 License

You need to update your Tally.ERP 9 license when:

     TDL or other configurations linked to your account have to be used.

     Add-ons purchased from TallyShop have to be used.

     Tally Software Services (TSS) subscription is renewed.

     Your Tally.ERP 9 has switched to Education Mode as it is unable to access the license in your computer.

To update your Tally.ERP 9 license

1.    Start Tally.ERP 9.

2.    Click F12: Configure > Licensing > Update License.

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

4.    Press Enter to update your license. A confirmation message appears once your license is updated.

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

See also

Renewing Tally Software Service subscription

Licensing - FAQ