Income Tax Department issued Guidance on updating UDIN for Audit Reports Submitted by CA users.

The functionality for updating UDIN against the Audit reports submitted by CA users has been enabled at e-filing portal www.incometax.gov.in.
Please note that this functionality may not be used for updating UDIN for Forms submitted prior to April 2021.
In this functionality only those Forms will be shown which are accepted by the Assessee.
This Instruction document has to be read in conjunction with the Instruction for UDIN Functionality
View/ Update UDIN Details
After Statutory Form is uploaded by CA user, they can login to e-Filing Portal and navigate to e-File menu -> Income Tax Forms -> View/ Update UDIN Details
Detailed process note can be access from below link