Co-operative societies: expanded deduction rules for trading and inter cooperative investment income, plus definitional additions from 2026. Amendments to section 149 expand deductible business activities by adding cotton seed and cattle feed to qualifying primary societies, substitute clause (d) to allow whole income from investments (interest or dividends) between co-operative societies as deductible, and add a new sub-section defining consumers' co-operative society, primary agricultural credit society, and primary co-operative agricultural and rural development bank; effective 1 April 2026 for tax year 2026-2027 onward.