If the Assessing Officer (AO) deems your Income Tax Return (ITR) as 'defective' under section 139(9) of the Income Tax Act, 1961, you may receive a notice. For example, if there's a discrepancy in the spelling of your name between your PAN card and the ITR form, your ITR may be labelled as defective, leading to the issuance of a notice by the Income Tax Department (ITD). While receiving a notice from the ITD can be unsettling, rectifying the issue with a defective ITR is a straightforward process. Here's how you can address the problem.