Form 16PartA vs PartB vs 26 AS Issue

anuj kumar khaitan (Article ) (126 Points)

28 September 2019  
My client has received salary of 10 lacs in FY 18-19.Above amount of 10 lacs is showing in Part-B of Form-16.
However wrong amount of 12 lacs is showing in 26AS as well as Part-A of Form-16.
Salary actually received is 10 lacs only.
ITR has been filed considering the income of 10 lacs only.
Now he has received notice from IT Dept u/s 139(9) for Defective Return.
What should be the way forward in such case as the company in which the client was working has closed down.