Reassessment proceedings initiated after an assessee's death must be commenced against the legal representative under Section 159(2)(b) of the Income-tax Act. The statutory fiction for continuation through a legal representative applies only when proceedings were validly initiated during the assessee's lifetime. A notice under Section 148 issued to a deceased person is non est, cannot be cured by Sections 292B or 292BB, and is not validated by the legal representative's participation after a timely objection. Consequently, reassessment and assessment made in the deceased person's name are void, while the underlying additions remain unexamined.

Transfer-pricing analysis of interest on non-convertible debentures requires comparability filters supported by reliable data and an economic rationale. A minimum-tenure threshold cannot be treated as appropriate merely by assertion where comparable evidence does not show a consistent relationship between tenure and coupon rate. For interest-limitation purposes, the section 94B computation is confined to interest on debt issued by a non-resident associated enterprise. Interest paid to non-associated enterprises must therefore be excluded, and the computation must reflect any transfer-pricing adjustment deletion and existing voluntary disallowance to avoid duplicate disallowance.

Compulsorily convertible debentures retain their debt character until conversion into shares, even where they are hybrid instruments, compulsorily convertible, and lack ordinary principal repayment. Transfer-pricing analysis cannot substitute equity for debt solely on those features where the governing terms remain unchanged. Recharacterisation as equity requires invocation of the General Anti-Avoidance Rule framework, including a declaration of an impermissible arrangement and compliance with prescribed safeguards and procedure. In the absence of such action, pricing interest at nil by treating the debentures as equity is unsustainable, requiring deletion of the transfer-pricing adjustment.

Compulsorily convertible debentures remain debt until actual conversion for transfer-pricing purposes. Prospective mandatory conversion does not itself justify equity recharacterisation, and regulatory, accounting, FEMA and RBI classifications operating in separate fields do not alter a valid borrowing's transfer-pricing character. Interest on INR-denominated debentures is benchmarked against comparable domestic lending rates rather than foreign-currency rates. The moratorium period must be reflected in the instrument's effective economic borrowing cost; an effective rate within an interest-bearing comparable range supports arm's-length recognition. Interest carry-forward requires separate treatment under the applicable statutory framework.

Section 68 requires proof of the nature and source of credited sale proceeds; formal contract notes, demat records, stock-exchange transactions and banking receipts do not establish genuine long-term capital gains where operator records, implausible price movements, preferential allotments and fund trails indicate accommodation entries on human-probabilities and preponderance tests. Related commission expenditure supported by seized material may be treated as unexplained expenditure. Expenditure relating to exempt income requires a fresh Section 14A determination where relevant exempt gains were not considered. A credit may be assessed only in the person's hands where seized material supports that attribution. Unexplained loans require proof of lender creditworthiness and transaction genuineness. Penalty notices must specify the precise charge; omnibus notices for concealment or inaccurate particulars are invalid.

For Section 56(2)(vii)(b), where an allotment letter identifies the specific flat, area, consideration and material purchase terms, and part consideration is paid through banking channels on allotment, stamp duty value is determined as on the allotment date. A later registered sale agreement resulting from project-completion delay does not displace that valuation date. The proviso applies when the allotment fixes consideration and the required payment condition is met, preventing an addition based on the stamp duty value at registration.

Section 115BAD concessional-regime election was not completed where the return claimed deduction under section 80P and expressly recorded that no option had been exercised, despite inadvertent filing of Form 10-IF on the same date. Processing the return under the concessional regime solely because of Form 10-IF conflicted with the election declared in the return. The assessee could not be compelled to adopt section 115BAD; disallowance of the section 80P deduction and computation under the concessional regime were unsustainable.

Penalty proceedings for an alleged contravention of Section 269SS require foundational satisfaction recorded and discernible during assessment proceedings. Although the authority imposing penalty under Section 271D may differ from the assessing authority, a later show-cause notice cannot replace absent satisfaction in the assessment order. Participation in penalty proceedings does not cure that jurisdictional defect. Where the assessment order neither identifies a contravention of Section 269SS nor indicates initiation of Section 271D proceedings, the penalty proceedings are invalid and the penalty cannot be sustained.

CBDT jurisdictional allocation instructions under the Income-tax Act place reassessment authority for specified non-corporate assessees in mofussil areas with the ACIT/DCIT rather than an ITO where returned income exceeds the prescribed threshold. A notice issued by an officer lacking that pecuniary jurisdiction constitutes a jurisdictional defect and invalidates the consequential reassessment and assessment. Penalty for under-reporting of income, when imposed solely on an addition made in such reassessment, has no surviving basis once the reassessment order and addition are quashed.

Gross-profit estimation requires a reasoned rejection of books of account founded on cogent grounds and material defects before profits may be estimated. A decline in the gross-profit ratio alone does not justify an addition where adverse market conditions, reduced production and sales, and continuing fixed overheads explain lower profitability. Gross-profit examination also falls outside limited scrutiny confined to tax deduction or deposit defaults and related business loss unless the prescribed conversion to complete scrutiny is validly made. The gross-profit addition was therefore deleted, with consequential relief required.

Penalty proceedings under Section 271AAB(1) require a notice that identifies the applicable clause-(a), (b), or (c)-and the precise statutory default, because each clause prescribes distinct factual conditions and penalty rates. Section 271AAB(3) applies the notice requirement in Section 274 to these proceedings. A notice merely proposing penalty under Section 271AAB does not permit an effective defence and is invalid. Later hearing notices or the assessee's participation cannot cure the defect or create jurisdiction. Consequently, defective notice vitiates initiation and the resulting penalty.

Article 11 of the India-Ireland Double Taxation Avoidance Agreement limits Indian tax on interest paid to an eligible Irish resident to 10% of gross interest, including interest on an income-tax refund. Section 90(2) of the Income-tax Act permits application of that treaty rate where it is more beneficial than domestic law. Tax deducted at source credit requires verification of whether credit was previously granted and, if not, must be allowed to the extent eligible under law. The treaty limitation therefore governs refund-interest taxation, while the withholding-credit claim remains subject to factual verification.

Concealment penalty was not leviable where the disallowance of interest on secured premium notes was subsequently reversed because the borrowing related to business purposes. A disallowance in assessment does not, by itself, establish concealment when the taxpayer has disclosed all material facts and provided a bona fide explanation. The interest claim was regarded as debatable, preventing the imposition of penalty under Section 271(1)(c) of the Income-tax Act, 1961.

Interest on borrowings used to acquire shares in a subsidiary qualifies as deductible business expenditure where the acquisition serves business expansion and commercial expediency. Increasing shareholding in an entity operating in the same line of business, followed by its merger and expansion of multiplex resources, showed that the dominant purpose was securing control and maximising business resources rather than earning dividend income. The interest was therefore allowable under section 36(1)(iii) of the Income-tax Act.

Rule 68B limitation permits an amendment to extend recovery time only where the original limitation period remained subsisting when the amendment took effect; recovery for assessment years 2007-08 and 2008-09 was therefore time-barred, unlike later years. For recovery against a partnership firm, notice to the firm named in the recovery certificate suffices for sale of firm assets, while individual notice is required if a partner's personal assets are targeted. Service on the firm and copies to partners satisfied the applicable notice and natural-justice requirements. Auction sales remain valid absent material proof of defective service, irregular valuation, inadequate price, or invalid payment; demand drafts funded on behalf of the purchaser do not alone invalidate the sale.

A consequential assessment made under Section 143(3) read with Section 263 cannot survive where the underlying revision order has been quashed. The revision order is the jurisdictional foundation for that assessment; once quashed, it no longer confers authority on the Assessing Officer. A pending Revenue challenge to the quashing order does not preserve jurisdiction or operate as a stay. Consequently, the assessment lacks a surviving legal basis and is invalid.

A reassessment following a return furnished in response to Section 148 requires a valid notice under Section 143(2) issued after that return. A notice issued before the return cannot meet this mandatory requirement. Section 292BB may cure defects in the service, timing or manner of service of an issued notice, but cannot cure the absence of a valid post-return notice. Failure to issue the required notice is a jurisdictional defect rather than a curable procedural irregularity, rendering the reassessment invalid.

Reassessment initiation requires a meaningful opportunity to respond and consideration of the assessee's reply before a determination is made. Curtailing the statutory response period despite available time, where an extension was sought before the deadline and a reply was uploaded before the order, causes prejudice and violates principles of natural justice. The order under Section 148A(d) and consequential reassessment notice under Section 148 were set aside, requiring a fresh determination after considering the reply.

Revision under Section 263 validly applies where an assessment order is both erroneous and prejudicial to Revenue interests. Expenses claimed despite alleged non-deduction of tax at source required verification from the assessee's records, including evidence of tax deduction and deposit. An unsupported assertion that much of the expenditure comprised reimbursements did not cure the assessment's lack of enquiry. Failure to undertake adequate verification of the tax-deduction-at-source implications rendered the assessment order erroneous and prejudicial to Revenue interests, permitting revision.

Rule 29 compliance for additional evidence required fresh determination where Tribunal receipt endorsements and file inspection prima facie showed that Paper Book No. II-A and the supporting affidavit had been filed. The absence of a separately titled Rule 29 application did not by itself justify doubting their filing. The Tribunal must determine whether the affidavit met Rule 29 requirements and, if so, whether the additional material was relevant to the appeal and what consequential effect it should have. The rejection of the miscellaneous application was set aside only to that extent; the grievance concerning Paper Book No. II was not pursued.