Refund on appeal, etc
(1)
Where, as a result of any order passed in appeal or other proceeding under this Act, refund of any amount becomes due to the assessee, the Assessing Officer shall, except as otherwise provided in this Act, refund the amount to the assessee without his having to make any claim in that behalf.
(2)
Where, by the order as referred to in sub-section (1),—
(b)
the assessment is annulled, the refund shall become due only of the amount, if any, of the tax paid in excess of the tax chargeable on the total income returned by the assessee.