"SECTION 75. Declaration of Quarterly Corporate Income Tax. - Every corporation shall file in duplicate a quarterly summary declaration of its gross income and deductions on a cumulative basis for the preceding quarter or quarters upon which the income tax, as provided in Title II of this Code, shall be levied, collected and paid. The tax so computed shall be decreased by the amount of tax previously paid or assessed during the preceding quarters and shall be paid not later than sixty (61) days from the close of each of the first three (3) quarters of the taxable year, whether calendar or fiscal year.

"SECTION 76. Fiscal Adjustment Return. - Every corporation liable to tax under Section 27 shall file a final adjustment return covering the total taxable income for the preceding calendar or fiscal year. If the sum of the quarterly tax payments made during the said taxable year is not equal to the total tax due on the entire taxable income of that year, the corporation shall either:

"(A) Pay the balance of tax still due; or

"(B) Carry-over the excess credit; or

"(C) Be credited or refunded with the excess amount paid, as the case may be.

"In case the corporation is entitled to a tax credit or refund of the excess estimated quarterly income taxes paid, the excess amount shown on its final adjustment return may be carried over and credited against the estimated quarterly income tax liabilities for the taxable quarters of the succeeding taxable years. Once the option to carry-over and apply the excess quarterly income tax against income tax due for the taxable quarters of the succeeding taxable years has been made, such option shall be considered irrevocable for that taxable period and no application for cash refund or issuance of a tax credit certificate shall be allowed therefor.