Tds revision process when tax ded. athigher rate because of no pan

One of the policyholders at our firm gave us their PAN but due to negligance we failed to include it during filing and tax got deducted at 20% (Reason - "C").

Currently we are filing revised return with PAN so that the customer can download form16A

My question is - do we have remove the reason for higher deduction tag (deduction at higher rate due to non availability of PAN -C) as PAN is available now.

Apart from that is there anything else required to do?