Foreign tax definition determines FTC scope: DTAA-covered taxes apply, otherwise income-tax-type foreign levies qualify for credit.

Definition of foreign tax for Foreign Tax Credit under Rule 128: where a DTAA exists, foreign tax is the tax covered by that DTAA; where no DTAA exists, foreign tax is the tax payable under the foreign country's law in the nature of income-tax as defined in the statutory explanation, including excess profits tax or business profits tax charged on profits by central or local authorities.

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