Every assessee, who earns income in excess of the basic exemption limit in a Financial Year (FY), must file a statement containing details of his income, deductions, and other related information. This is called the Income Tax Return. Once you as a taxpayer file the income returns, the Income Tax Department will process it. There are occasions where, based on set parameters by the Central Board of Direct Taxes (CBDT), the return of an assessee gets picked for an assessment.