“beyond four years”

For reassessment proceedings, the 'reason to believe' that income has escaped assessment must be based on some material and not mere suspicion, establishing a live link between the information and the belief. Furthermore, for reassessment beyond four years, there must be a specific finding of the assessee's failure to disclose fully and truly all material facts.

The validity of reassessment proceedings initiated under Section 147, by issuing a notice under Section 148, must be judged solely on the reasons originally recorded by the Assessing Officer. These recorded reasons cannot be supplemented, improved upon, or modified at any later stage.

Reassessment proceedings initiated under Section 147 beyond four years from the end of the relevant assessment year are invalid unless the assessee failed to disclose fully and truly all material facts necessary for assessment. Without such failure, the notice issued under Section 148 is time-barred and without jurisdiction.

A mere charge of bogus expenses, without a specific finding that the assessee failed to disclose material facts, is insufficient to justify reassessment beyond four years under the first proviso to Section 147. Courts can examine the materiality and relevance of facts forming the 'reason to believe' for initiating reassessment, ensuring it is based on reasonable grounds.

An audit objection that points out a factual error or omission overlooked by the Assessing Officer during the original assessment constitutes tangible material or information justifying the reopening of assessment under Section 147. This principle applies even for reopening beyond four years and is not considered a mere change of opinion.

For valid initiation of reassessment proceedings, the Assessing Officer must possess tangible material and apply independent mind to form a 'reason to believe' that income has escaped assessment. Reassessment cannot be based on mere borrowed satisfaction or unverified information without proper scrutiny.

The Assessing Officer is considered to have applied their mind and formed an opinion on an issue if the assessee fully disclosed all material facts and responded to queries during the original assessment, even without explicit discussion in the assessment order. Reopening an assessment beyond four years on such an issue without new tangible material constitutes a mere change of opinion and is impermissible under Section 147.

Approval for reassessment under Section 151 requires the approving authority to apply its mind and form an opinion, not merely endorse it mechanically. Additions under Section 68 cannot be made based on suspicion alone and require conclusive evidence.