S. 37(1) : Business expenditure-Setting up of business Commencement of business-Once the business is set up expenditure is fully allowable subject to verification that assessee had not claimed depreciation thereon and expenditure not claimed in any other year-Payment for expenses against corporate cards given to managerial personnel-Bills not received and expense written off as bad debts-Allowable as business expenditure. [S. 28(i), 32, 35D, 36(1)(vii), 145]