The credits provided in this subpart may, at the option of the taxpayer and irrespective of the method of accounting employed in keeping his books, be taken in the year in which the taxes of the foreign country or the possession of the United States accrued, subject, however, to the conditions prescribed in subsection (c). If the taxpayer elects to take such credits in the year in which the taxes of the foreign country or the possession of the United States accrued, the credits for all subsequent years shall be taken on the same basis, and no portion of any such taxes shall be allowed as a deduction in the same or any succeeding year.
Except as provided in subparagraph (B), in making the redetermination under paragraph (1), no credit shall be allowed for accrued taxes not paid before the date referred to in subparagraph (B) of paragraph (1).
The amount of tax (if any) due on any redetermination under paragraph (1) shall be paid by the taxpayer on notice and demand by the Secretary, and the amount of tax overpaid (if any) shall be credited or refunded to the taxpayer in accordance with subchapter B of chapter 66 (section 6511 et seq.).
In the case of any tax accrued but not paid, the Secretary, as a condition precedent to the allowance of the credit provided in this subpart, may require the taxpayer to give a bond, with sureties satisfactory to and approved by the Secretary, in such sum as the Secretary may require, conditioned on the payment by the taxpayer of any amount of tax found due on any such redetermination. Any such bond shall contain such further conditions as the Secretary may require.
In any redetermination under paragraph (1) by the Secretary of the amount of tax due from the taxpayer for the year or years affected by a refund, the amount of the taxes refunded for which credit has been allowed under this section shall be reduced by the amount of any tax described in section 901 imposed by the foreign country or possession of the United States with respect to such refund; but no credit under this subpart, or deduction under section 164, shall be allowed for any taxable year with respect to any such tax imposed on the refund. No interest shall be assessed or collected on any amount of tax due on any redetermination by the Secretary, resulting from a refund to the taxpayer, for any period before the receipt of such refund, except to the extent interest was paid by the foreign country or possession of the United States on such refund for such period.