Covering letter for documents produced to the audit team, with index

On the letterhead of the taxpayer — two copies, one receipted by the officer and retained on file

To
The [Assistant / Deputy] Commissioner of [Central / State] Tax
Audit [Circle / Group ____], [Audit Commissionerate]

Sub: Audit under section 65 for the period [FY ____ to FY ____] pursuant to Form GST ADT-01 bearing Reference No. [Reference number of the ADT-01 notice] dated [Date of the ADT-01 notice] — production of records — tranche [Tranche number of this production] — GSTIN [Taxpayer's GSTIN]