26 CFR § 1.547-6 - Suspension of statute of limitations and stay of collection.
(a) Statute of limitations. If the corporation files a claim for a deduction for deficiency dividends under section 547(e) and paragraph (b)(2) of § 1.547-2, the running of the statute of limitations upon assessment, distraint, and collection in court in respect of the deficiency, and all interest, additional amounts, or assessable penalties, shall be suspended for a period of two years after the date of the determination under section 547(c) and paragraph (b)(1) of § 1.547-2.
(b) Stay of collection. If a deficiency in personal holding company tax is established by a determination under section 547(c) and paragraph (b)(1) of § 1.547-2, collection by distraint or court proceeding (except in case of jeopardy), of the deficiency and all interest, additional amounts, and assessable penalties, shall be stayed for a period of 120 days after the date of such determination, and, to the extent any part of such deficiency remains after deduction for deficiency dividends, for an additional period until the date the claim is dis allowed. After such claim is allowed or rejected, either in whole or in part, the amount of the deficiency which was not eliminated by the application of section 547, together with interest, additional amounts and assessable penalties, will be assessed and collected in the usual manner.