S. 143(3): Assessment]-Limited scrutiny-Conversion of limited scrutiny into complete scrutiny without prior approval-Cash deposit-AO was obliged to take the specific permission of the Principal CIT before expanding the scope of enquiry to cover the credits in the assessee’s bank account-Failure to do so is a clear violation of the CBDT Instruction No. F. No. 225/402/2018/ITA.II, dt. 28th Nov., 2018-The addition made by him is not sustainable-Cash credit]-Reconciliation was filed]-Addition was deleted. [S.68]