S. 263 : Commissioner-Revision of orders prejudicial to revenue-Cash credit-Assessing the deposits as undisclosed turnover and estimating income at 4% of turnover-Only probability and likelihood to find error in assessment order is not permitted-Revision is held to be not valid-When undisclosed amount of assessee in his bank account as undisclosed business receipts/turnover provision of 115BBE would not attract. [S. 68, 115BBE]