S. 40(a)(i) : Amounts not deductible – Deduction at source -Non-resident – Amount not claimed as expenditure- No disallowance can be made – Exemption certificate for non deduction of tax at source- Once certificate has been issued no disallowances can be made – If income is not chargeable to tax in India -No disallowance can be made- Once it is held that income is not chargeable to tax in India, no disallowance can be made. [ S.195 , 197 ]