S. 37(1) : Business expenditure 1Purchases related to infrastructure project 1Filed taxpayer Identification number of vendors (TAN)-Failed to file Permanent Account Number and income-tax returns copies of vendors – Failure to deduct tax at source – Purchases cannot be treated as not genuine-Inadequate Investigation by Assessing Officer 1Expenses are allowable-Valuation of property 1Accounts 1Maintaining regular books of account and transactions recorded in books of account – Addition cannot be made on the basis of Valuation Officer’s report – Loose sheet – Matter is remanded. [S. 69C, 133(6), 145]