Section 40(b) of the Income Tax Act

A new industrial undertaking is not considered a reconstruction of an existing business for tax deduction purposes if it is a separate, independent production unit manufacturing commercially tangible products that can operate without losing its identity in the old business. The transfer and substantial use of assets and manpower from an old business to a new one may indicate reconstruction.

Incentive provisions in the Income-tax Act, particularly those granting deductions for new industrial undertakings, must be construed liberally to achieve their legislative purpose. This principle guides the interpretation of conditions such as what constitutes a 'new undertaking' versus a 'splitting up or reconstruction' of an existing business for claiming deductions.

A partner's income from a firm, including salary, bonus, commission, or remuneration, is considered business income in their hands. Expenses necessary for earning this business income are deductible.

Provisions granting deduction, exemption, or relief to an assessee are to be interpreted liberally and in favour of the assessee.

Section 68 additions can be made based on impounded papers, even if sums are not credited in books, to prevent assessees from benefiting from their own lapses.

Expenditure incurred with a view to producing profits is considered revenue expenditure.

Where a firm claims deduction for partner's remuneration under Section 40(b), income from other sources that is included in the profit and loss account cannot be excluded when calculating 'book profit'.