S. 263 : Commissioner-Revision of orders prejudicial to revenue-Lack of proper enquiry-Lease rent-Detailed enquiry was made in the course of assessment proceedings-All details were furnished-Order is not erroneous-Revision is quashed-Repairs and maintenance-freight forwarding, miscellaneous expenses and sales promotion-Revision is justified as regards to freight forward expenses. [S. 40A(2)(b), 142(1), 194I]