Accumulation distributions
(d) Accumulation distributions. (1) Accumulation distributions of $20,000 and $7,050, as defined in section 665(b), were made to B during the years 1956 and 1957, respectively, computed as shown below: (3) The accumulation distribution for 1956 must first be allocated to the preceding taxable years as provided in section 666. After the application of the provisions of subpart D to the 1956 accumulation distribution and to the undistributed net incomes of the preceding taxable years, a similar allocation must be made of the 1957 accumulation distribution.