One of my client made contribution to a political party and claimed deduction while filing the ITR last. In this year there was a raid at that office and now the office is under investigation for money laundering. My client has received message from income tax department stating that he made contribution to a suspicious entity and it is suggested to revise the ITR. 

Can someone please guide whether the ITR shall be revised in this case. The contribution to the political party was made via bank transfer