For limitations in case of—

(1) Deficiency dividends of a personal holding company, see section 547.

(2) Tentative carry-back adjustments, see section 6411.

(3) Service in a combat zone, etc., see section 7508.

(4) Suits for refund by taxpayers, see section 6532(a).

(5) Deficiency dividends of a regulated investment company or real estate investment trust, see section 860.