S.80IA: Industrial undertakings-Enterprises engaged in infrastructure development-Profits derived from eligible business-Interest-Interest on fixed deposits placed for fulfilling obligations under licence agreement-Interest receipt having direct nexus with business-Does not fall under head “Income from other sources-Entitled to deduction under section 80IA on interest from fixed deposits-Interest on refund of excess tax deducted at source-Excess deduction of tax at source formed part of sales receipt of assessee from eligible business-Entitle to deduction under section80IA on interest on fixed deposits and interest on refund of excess tax deducted at source. [S. 56, 260A, Art. 226]