Judgment K. RAVIRAJA PANDIAN, J. The revenue is on appeal against the order of the Income Tax Appellate Tribunal, C Bench, Chennai dated 22.06.2009 made in ITA No.2014/Mds/2008. 2. The minimum facts required for disposal of this appeal, as culled out from the statement of facts are as follows : The assessee is a public limited company carrying on business in manufacture and sale of fibre cement sheet, accessories, fibre cement pipes and cotton yarn. For the assessment year 2001-01 the assessee filed its return of income on 211. 2000 admitting a total income of Rs.6,78,42,400/-. The assessment was completed under section 143(3) of the Act on 07.03.2003 determining the total income at Rs.10,96,71,500/- in which Rs.4,88,20,435/- was allowed as depreciation and Rs.2,45,59,438/- was allowed as deduction under section 10B of the Income Tax Act, 1961. Subsequently, the assessment was reopened based on the revenue audit objection. The reopened assessment under section 143(3) read with section 147 of the Act was completed on 212. 2007 determining the total income of Rs.11,26,02,970/-. In the reopened assessment, the assessing officer has withdrawn a sum of Rs.1,14,00,164/-, which he considered as excess depreciation granted on the export oriented unit, and also restricted the deduction under section 80IB of the Act to Rs.33,72,436/- instead of Rs.1,82,14,811/-, allowed in earlier order. The assessee carried the matter on appeal to the Commissioner of Income Tax (Appeals), who has deleted the disallowance of depreciation made by the assessing officer as aforesaid on the ground that the method followed by the assessee was correct and the audit party committed a mistake. That order was carried on appeal at the instance of the revenue. The Income Tax Appellate Tribunal upheld the order of the Commissioner of Income Tax (Appeals) and dismissed the revenues appeal. The correctness of the same is canvassed in this appeal by formulating the following substantial questions of law : .1. Whether on the facts and in the circumstances of the case, the Income Tax Appellate Tribunal was right in law in deleting the addition of Rs.1,14,00,164/- even though mistake in computation of deduction under section 10B of the Income Tax Act, 1961, is valid? 2. Whether on the facts and in the circumstances of the case, the Appellate Tribunal was right in law in holding that the interest under section 234-D of the Act cannot be levied for the period prior to 01.06.2003 is valid? 2. Whether on the facts and in the circumstances of the case, the Appellate Tribunal was right in law in holding that the interest under section 234-D of the Act cannot be levied for the period prior to 01.06.2003 is valid? 3. Heard the learned counsel for the revenue and perused the materials available on record. .4. It could be seen from the records available that the Commissioner of Income Tax (Appeals), after going through the audit objection and the stand of the assessing officer, found that the assessing officer has blindly followed the audit objection without applying his mind to the correct method of working of taxable income. Admittedly, the assessee started with the figure of profit as per books for all the units at Rs.17,21,45,681/-and there was no dispute on this. The book profit relating to section 10B unit at Rs.2,45,59,438/- and there was also no dispute and even the audit party has accepted this figure. What the assessee has done was the first the book profit (after depreciation) relating to 10B unit was excluded in the memo of total income and on the balance taxable profit. The assessee added back the book depreciation relating to other units (other than 10B unit) and claimed income tax depreciation at Rs.4,88,20,435/-in respect of other units. There is no mistake in the method followed by the assessee. According to the Commissioner of Income Tax (Appeals), the audit party considered two items out of three items to be actually considered for adjustment and came to the conclusion that there was understatement of total income. The assessing officer, without application of mind to the materials available on record, blindly followed the audit objection and revised the assessment. The exact mistake of the audit party was that after its stand that the book depreciation relating to all the units should be added back in the memo of total income, but it omitted to consider the fact that the assessee would be entitled to income tax depreciation in respect of all the units whereas the company had claimed only income tax depreciation of other units except 10B unit. This is the mistake committed by the audit party and even though the proper and correct reply was submitted by the assessee, the assessing officer, without due application of mind, revised the assessment order. This is the mistake committed by the audit party and even though the proper and correct reply was submitted by the assessee, the assessing officer, without due application of mind, revised the assessment order. The reasons stated by the Commissioner for setting aside the assessment order has been accepted by the Tribunal. Before us, the revenue is not able to establish that the view taken by the Commissioner of Income Tax (Appeals) and confirmed by the Tribunal is not in accordance with law. So is the issue with regard to section 234D penalty. The Commissioner of Income tax (Appeals) has observed that section 234D of the Act is applicable only where any refund is granted to the assessee under section 143(1) of the act and the same is payable back to the department on completion of the assessment under section 143(3) of the Act. The assessing officer has not granted refund under section 143(1) of the Act and in the circumstances section 234D is not applicable. From the reading of section, it makes it clear that section 234D would apply only in respect of refund made under section 143(1) of the Act. Hence, we do not find any illegality or irregularity in the order passed by the Commissioner of Income Tax (Appeals), which has been confirmed by the Tribunal. 5. In the result, we find that the first question of law formulated, cannot be regarded as a substantial question of law for the purpose of entertainment of the appeal and with regard to the second question of law, as section 234-D of the Act could be invoked only for the refund granted under section 143(1) of the Act, the question of law is answered against the revenue and in favour of the assessee. The appeal deserves to be dismissed and it is accordingly dismissed. No costs.