Revision is the exception
A filed tax audit report is meant to be final, but the ICAI’s guidance allows a revision in specific situations — principally where the underlying accounts are themselves revised (for instance, adopted in a later AGM in a different form), or where a change in law or its interpretation (such as a retrospective amendment or a court ruling) requires a recomputation.
How it's done
The auditor issues a revised report clearly marked as a revision, stating the reason for it, and it is re-filed. It cannot be used to simply correct a careless original or to change a view for convenience — the grounds are narrow and must be documented. Confirm the acceptable grounds before revising.
A worked example
Example: after a tax audit report is filed, a retrospective amendment changes how a particular deduction is computed — the auditor issues a revised 3CD reflecting the new position, noting the legal change as the reason. By contrast, simply realising a figure was keyed wrong is handled differently and shouldn’t routinely trigger a ‘revision’. Our team can advise whether a revision is appropriate.