Notwithstanding section 7421(a), any action which violates subsection (b) may be enjoined in the proper court, including the Tax Court. The Tax Court shall have no jurisdiction to enjoin any action under this subsection unless a timely petition has been filed under section 6234 and then only in respect of the adjustments that are the subject of such petition.
If a partnership is a partner in another partnership, any adjustment on account of such partnership’s failure to comply with the requirements of section 6222(a) with respect to its interest in such other partnership shall be treated as an adjustment referred to in subparagraph (A), except that paragraph (2) of section 6213(b) shall not apply to such adjustment.
For purposes of paragraph (1), a partner’s proportionate share is such percentage as the Secretary may determine on the basis of such partner’s distributive share. The Secretary shall make determinations under the preceding sentence such that the aggregate proportionate shares so determined total 100 percent.
For purposes of this subsection, an S corporation and its shareholders shall be treated in the same manner as a partnership and its partners.
Subchapter B shall not apply to any assessment or collection under this paragraph.
Except as otherwise provided in this subtitle, no assessment may be made (or proceeding in court begun without assessment) with respect to any partner with respect to an amount under paragraph (1) after the date which is 2 years after the date on which the Secretary provides the notice and demand referred to in paragraph (1) with respect to such amount.