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"Use Edit Log for transactions/masters, and digital signature for invoices/reports with Release 2.1. Download NOW!"
https://help.tallysolutions.com/docs/te9rel53/Data_Migration/Upgrading_to_TE9_Release_5.htm

Upgrading to Tally.ERP 9 Release 5.0

To upgrade to Tally.ERP 9 Release 5.0

1.     Download Tally.ERP 9 Release 5.0.

2.     Install Tally.ERP 9 Release 5.0 on your system.

3.     Backup your data before migrating to Tally.ERP 9 Release 5.0.

4.     Migrate or move your data to Tally.ERP 9 Release 5.0.