S. 4 : Charge of income-tax-Firm-Partner-Double taxation-Wrong person assessed-Sale to partner without registration in earlier years-Registration deed in latter years-taxable in the year of registration-Partner declaring the income is his hands and paying taxes-Department entitled to tax income in hands of correct person-Partner at liberty to take remedial action for exclusion of amount from his total income. [S. 2(24), 145, Registration Act, 1908, S. 17(1A) 49]