You need to update your Tally.ERP 9 license when:
● TDL/general configuration assigned to the account have to be applied to the respective site.
● Tally Software Services (TSS) needs to be renewed.
To update the license
● Go to Gateway of Tally > F12: Configure > Licensing > Update License.
● Enter the e-mail ID and password in the Administrator Login screen, and press Enter.
A confirmation message is displayed once the license is successfully updated.