More taxpayers getting defective ITR notice from tax dept this year; How to rectify the defect

Defective ITR: Chartered accountants report that many of thier clients have received defective ITR notices this year. As per Amit Bansal, Partner - Direct Tax, Singhania & Co, Yes, there has been a noticeable increase in defective ITR notices and invalid returns this year." Know what to do incase you get a defective tax return notice under section 139(9).