(b) section 1027 is to be read as if the following paragraph was added after the second paragraph:“In the formula in subparagraph iii of subparagraph a of the first paragraph,
(a) A is the corporation’s tax for the taxation year estimated in accordance with section 1004 or the corporation’s first basic provisional account referred to in subparagraph i of subparagraph a of the first paragraph;
(b) B is the aggregate of the payments that the corporation was required to make in the taxation year and before the particular time referred to in section 1027.0.3, in accordance with subparagraph iii of subparagraph a of the first paragraph; and
(c) C is the number of months in the taxation year that end after the particular time referred to in section 1027.0.3.”