The latest version under Tally.ERP 9 Release 6 series is Release 6.4.6, launched on 5th July, 2018.

Below are the key enhancements of Tally.ERP 9 Release 6.4.6:

Support for latest GSTR-4 offline tool

Tally.ERP 9 now supports the latest offline tool, Version 2.3, for GSTR-4

e-Way Bill enhancements in Release 6.4.6 

• Tally.ERP 9 now supports the latest e-Way Bill and Consolidated e-Way Bill JSON Preparation Tools, Ver. 1.0.0618

• In case your state has different threshold limits for intrastate and interstate e-Way Bills, you can now manage both the threshold limits in Tally.ERP 9

Addition of new validation and alert messages 

• We have introduced GSTIN validation for UN Bodies and Embassy as well as Government departments

• To bring in higher accuracy, we have introduced new validations and improved alert messages

Please read Tally latest blog post on Minimize Mismatches between GSTR-2A and GSTR-3B using Tally.ERP 9 

http://blogs.tallysolutions.com/minimize-chances-of-gstr3b-gstr2a-mismatch-using-tally-erp9/