S. 151 : Reassessment-After the expiry of four years-Sanction for issue of notice-Sanction by Additional CIT is not valid-Taxation and other laws (Relaxation of Certain Provisions) Act, 2020-Not applicable-Reassessment notice and order disposing the objection was quashed. [S. 147, 148, 151(1), 151(2), Art. 226]