Type search words and press enter
"Use Edit Log for transactions/masters, and digital signature for invoices/reports with Release 2.1. Download NOW!"
https://help.tallysolutions.com/docs/te9rel61/Licensing/Error_Code_6457.htm

Error Code 6457: Your TSS subscription has expired. You can use (Product name) Series A Release (Version) or below. Renew your TSS subscription to upgrade.

Cause

This error occurs when your TSS subscription has expired, and you try to reactivate your license after you upgrade to a later release.

Solution

     You must renew your TSS subscription to use all features of the latest release.

     Click here to download the earlier version.