Hi..
Mohit
I agreed with all freinds reply , but,
As per U/s 139(5) can be filed only if the original return filed within the due date,and the revised return should be filed only if the mistake is bonafied.The benefit of section 139(5) cannot be claimed by a person who has made false return knowing it to be false.It is to be noted also that once a revised return is filed the original return stands withdrawn.
As per U/s. 271(1)(c) of Income Tax Act provides penalty for concealment of Income and for furnishing inaccurate particulars in the return of Income.
It is to be noted that if revised return is filed to correct a bonafide mistake then no penalty can be levied, otherwise it can be levied.
Conclusion: Return of Income should be filed within due date and with utmost care. If bonafidely some mistake still happens in the original return then the benefit of filing the revised return can be taken.
It is advisable that if any mistake has happened in the original return then revised return should be filed before any action on the mistake is taken by the AO to escape penalty u/s 271(1)(c).