S. 143(3): Assessment-Wrong mention of section 69 instead of section 50C-Typographical error-Assessment valid-Absence of Document Identification Number (DIN)-No prejudice shown-Assessment not invalid-Manual signature-Absence of digital signature-Assessment valid-Capital gains-Full value of consideration-Stamp valuation-Stamp duty value exceeding declared sale consideration-Addition upheld-Search assessment-Approval of prescribed authority-Approval available on record-Assessment upheld. [S.45, 50C, 69,132, 153D 282A]