Notice for escaped income under Section 148 requires recorded reasons and procedural compliance before reassessment. Issuance of a notice under section 148 requires the Assessing Officer to record reasons and serve a return notice allowing a prescribed filing period; the return filed in response is treated as a regular return for assessment processing and triggers further notice for assessment under the assessment provisions. A notice may be issued only where information from prescribed sources indicates escaped income, and only after prior higher authority approval and compliance with section 148A procedures, with searches, surveys, or seizure/requisition events deemed to constitute such information.