86 CODIFICATION OF INTERNAL REVENUE LAWS SEC. 274 . BANKRUPTCY AND RECEIVERSHIPS. (a) IMMEDIATE ASSESSMENT.- Upon the adjudication of bank- ruptcy of any taxpayer in any bankruptcy proceeding or the appoint- ment of a receiver for any taxpayer in any receivership proceeding before any court of the United States or of any State or Territory or of the District of Columbia, any deficiency (together with all interest, additional amounts, or additions to the tax provided for by law) determined by the Commissioner in respect of a tax imposed by this chapter upon such taxpayer shall, despite the restrictions imposed by section 272 (a) upon assessments be immediately assessed if such deficiency has not theretofore been assessed in accordance with law. In such cases the trustee in bankruptcy or receiver shall give notice in writing to the Commissioner of the adjudication of bank- ruptcy or the appointment of the receiver, and the running of the statute of limitations on the making of assessments shall be suspended for the period from the date of adjudication in bankruptcy or the appointment of the receiver to a date 30 days after the date upon which the notice from the trustee or receiver is received by the Commissioner; but the suspension under this sentence shall in no case be for a period in excess of two years. Claims for the deficiency and such interest, additional amounts and additions to the tax may be presented, for adjudication in accordance with law, to the court before which the bankruptcy or receivership proceeding is pending, despite the pendency of proceedings for the redetermination of the deficiency in pursuance of a petition to the Board; but no petition for any such redetermination shall be filed with the Board after the adjudication of bankruptcy or the appointment of the receiver. (b) UNPAID CLAIMS. -Any portion of the claim allowed in such bankruptcy or receivership proceeding which is unpaid shall be paid by the taxpayer upon notice and demand from the collector after the termination of such proceeding, and may be collected by distraint or proceeding in court within 6 years after termination of such proceed- ing. Extensions of time for such payment may be had in the same manner and subject to the same provisions and limitations as are provided in section 272 (j) and section 296 in the case of a deficiency in a tax imposed by this chapter. SEC. 275. PERIOD OF LIMITATION UPON ASSESSMENT AND COLLEC- TION. Except as provided in section 276- (a) GENERAL RULE. -The amount of income taxes imposed by this chapter shall be assessed within three years after the return was filed, and no proceeding in court without assessment for the collec- tion of such taxes shall be begun after the expiration of such period. (b) REQUEST FOR PROMPT ASSESSMENT.- In the case of income received during the lifetime of a decedent, or by his estate during the period of administration, or by a corporation, the tax shall be assessed, and any proceeding in court without assessment for the collection of such tax shall be begun, within eighteen months after written request therefor (filed after the return is made) by the executor, administrator, or other fiduciary representing the estate of such decedent, or by the corporation, but not after the expiration of three years after the return was filed. This subsection shall not apply in the case of a corporation unless- (.1) Such written request notifies the Commissioner that the corporation contemplates dissolution at or before the expiration of such 18 months' period; and (2) The dissolution is in good faith begun before the expiration of such 18 months' period; and (3) The dissolution is completed. (c) OMISSION FROM GRoss INcoME. - If the taxpayer omits from gross income an amount properly includible therein which is in excess
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