S. 148 : Reassessment -Notice – After the expiry of four years- Notifications issued by the Central Government under the Taxation and other laws (Relaxation and Amendment of Certain Provisions) Act, 2020 did not apply as the notices were issued prior to 1st April 2021- Time limit – Notices issued prior to 1st April 2021 beyond a period of four years from the expiry of the assessment year are time barred in terms of first proviso to section 147 as applicable prior to amendment made by the Finance Act, 2021- Sanction – Notice issued after seeking approval Jt. CIT instead of Chief CIT/ CIT Jt CIT instead of Chief CIT/ CIT- Notice was invalid. [S. 147, 151, Art, 226]