https://help.tallysolutions.com/docs/te9rel64/Data_Migration/Check_eligibity_to_upgrade.htm

Can I Upgrade to the Latest Release of Tally.ERP 9?

If you are using Tally.ERP 9 Release 1.0 to 6.4.4 or Tally 6.3, 7.2, 8.1, or 9, you can quickly check your eligibility to upgrade to Tally.ERP 9 Release 6.4.5.

Are you using Tally.ERP 9 Release 1.0 to 6.4.4?

Are you using Tally 6.3, 7.2, 8.1 or 9?