If any person, having furnished a return under sub-section (1) of Section 139 discovers any omission or any wrong statement therein, he may furnish a revised return at any time before the expiry of one year from the end of the relevant assessment year or before the completion of the assessment, whichever is earlier :..”
So it is clear that belated return u/s 139(4) can not be revised.
In simple terms , a person can revise return within:-
1)before expiry of one year from the end of relevant assessment year or 2)before completion of assessment, whichever is earlier.
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