M Com FCS LLB M-AIMA
14043 Points
Joined June 2009
File detailed submissions before him in case he has initiated proceedings either in the form of ASMT-10 or DRC-01. Make legal as well as factual arguments. Before that reconcile the input claimed as per 3b and books and also find out if any missing invoices reflected in subsequent period i.e. 2018-19. It is a nationwide problem, and a litigation prone matter.
I am uploading a youtube video on my channel the tax express regarding this in a day or two. You can watch the same for clarity on how to deal with such cases.