One of my client sold a house property amounting rs 17 lakhs in the a.y.09-10 and invested it capital infrastructure bond full 17 lakhs . But at the time of submitting his return I did not fill up the capital gain exemption area in e filling.Assesing Officer at the time of scrutiny assessment says that as this portion is blanked so it is undisclosed income though the assesse disclosed all the documents. Is it correct? Can the A.O treated as it undisclosed income . Please send few case laws.