Tax deduction at source on interest from securities requires specified rates, prescribed exemptions, and rounding to the nearest rupee. Tax must be deducted at source from interest on Government securities at rates determined by the payee's status and security type, subject to acceptance of exemption or abatement certificates issued under the relevant provision, specified statutory exemptions for certain securities and holders (including particular Defence Loans, Gold Bonds, National Savings Certificates, resident individuals meeting holding and income declarations, and exempt corporations), and a statutory rounding rule that rounds tax to the nearest rupee. Consult the Income tax Officer in cases of doubt.