Does subject-matter jurisdiction exist to enforce the income tax as a direct tax without limitation?

Is the graduated taxation of citizens unconstitutional class legislation that unlawfully discriminates?

Does graduated taxation of the American citizens destroy equal protection under the 14th Amendment?

Is a deficiency under IRC Sections 6211 and 6212 based only upon the Subtitle "A" tax laws?

Does subject-matter jurisdiction exist to enforce the income tax as a direct tax without limitation