In the case where a taxpayer, as well as his or her spouse and/or dependents who shall file a joint consolidated income tax return in accordance with the Income Tax Act, has an amount of income or deduction which is covered within the provisions of any of the Subparagraphs of Paragraph 1 of Article 12 and Paragraph 1 of Article 12-1, the taxpayer shall include any such amount in his or her return for the calculation of basic income.