Tax deduction at source on interest from government securities requires prescribed withholding, certificates, exemptions, and procedural compliance. Tax must be deducted at source on interest on Government securities at prescribed withholding rates varying by payee class (persons other than companies and companies, with resident/non resident and domestic/non domestic distinctions). Exemption or abatement certificates under the statutory provision must be accepted if operative, and certain bonds, savings certificates, and exempt corporations are not subject to deduction where statutory declarations or notifications apply. Paying officers must follow certificate authorisations, obtain required written declarations from resident individuals claiming exemption, apply rounding rules to tax deducted, and consult the Income tax Officer when in doubt.