Example: For the taxable year 1954, a trustee, directed by the trust instrument to accumulate the trust income, made no distribution to the beneficiary and returned the entire income as taxable to the trust. Accordingly the beneficiary did not include the trust income in his return for the year 1954. In 1957, a State court holds invalid the clause directing accumulation and determines that the income is required to be currently distributed. It also rules that certain extraordinary dividends which the trustee in good faith allocated to corpus in 1954 were properly allocable to income. In 1958, the trustee, relying upon the court decision, files a claim for refund of the tax paid on behalf of the trust for the year 1954 and thereafter files a suit in the District Court. The claim is sustained by the court (except as to the tax on the extraordinary dividends) in 1959 after the expiration of the period of limitations upon deficiency assessments against the beneficiary for the year 1954. An adjustment is authorized with respect to the beneficiary's tax for the year 1954. The treatment of the distribution to the beneficiary of the extraordinary dividends shall be determined under subpart D of subchapter J.
Example: Assume the same facts as in the example in paragraph (b) of this section, except that, instead of the trustee's filing a refund claim, the Commissioner, relying upon the decision of the State court, asserts a deficiency against the beneficiary for 1954. The deficiency is sustained by final decision of the Tax Court of the United States in 1959, after the expiration of the period for filing claim for refund on behalf of the trust for 1954. An adjustment is authorized with respect to the trust for the year 1954.
Example: A trustee claimed in the trust return for 1954 for amounts paid to the beneficiary a deduction to the extent of distributable net income. This amount was included by the beneficiary in gross income in his return for 1954. In computing distributable net income the trustee had included short and long-term capital gains. In 1958, the Commissioner asserts a deficiency against the trust on the ground that the capital gains were not includible in distributable net income, and that, therefore, the gains were taxable to the trust, not the beneficiary. The deficiency is sustained by a final decision of the Tax Court in 1960, after the expiration of the period for filing claims for refund by the beneficiary for 1954. An adjustment is authorized with respect to the beneficiary's tax for the year 1954, based on the exclusion from 1954 gross income of the capital gains previously considered distributed by the trust under section 662.
Example: Assume the same facts as in the example in paragraph (d) of this section, except that, instead of the Commissioner's asserting a deficiency, the beneficiary filed a refund claim for 1954 on the same ground. The claim is sustained by the court in 1960 after the expiration of the period of limitations upon deficiency assessments against the trust for 1954. An adjustment is authorized with respect to the trust for the year 1954.
26 C.F.R. §1.1312-5