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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/te9rel49/Tax_Audit/Auditors_Edition_of_TallyERP.htm

Audit/Verification Tools of Tally.ERP 9

Tally.ERP 9 offers Audit/Verification Tools, which provide various auditing capabilities for Auditors and other Users. The Audit Tools have been provided for: