Cal. Code Regs. tit. 18, § 24636
(a) General Rule.
(4) The provisions of subsection (a) (3) may be illustrated by the following example:
EXAMPLE.
The X Financial Corporation makes a return for the one-month period ending September 30, 1969, because of a change in annual accounting period permitted under Section 24633. Income and expenses for the short period are as follows:
Gross operating income
$133,900
Business expenses
130,000
Net income from operations
$3,900
Net income for short period before annualizing
$3,900
Net income annualized ($3,900 x 12)
$46,800
Tax on annual basis: $46,800 at 11 percent
$5,148
Financial corporation offset (Section 23184)
348
Net tax
$4,800
Tax for one-month period ($4,800 x 1/12 )
$400
(b) Exception: Computation based on 12-month period.
(1) A taxpayer whose tax would otherwise be computed under Section 24636 (a) (or Section 24631 (f) (2) (B) (iii) on the case of certain changes from or to a 52-53-week income year) for the short period resulting from a change of annual accounting period may apply to the Franchise Tax Board to have its tax computed under the provisions of Section 24636(b) and this subsection. If such application is made, as provided in paragraph (4) of the subsection, and if the taxpayer establishes the amount of its net income for the 12-month period described in paragraph (2) of this subsection, then the tax for the short period shall be the greater of the following--
(B) The tax computed on the net income for the short period without placing the net income on an annual basis.
However, if the tax computed under Section 24636(b) and this subsection is not less than the tax for the short period computed under Section 24636(a) (or Section 24631(f)(2)(B)(iii) in the case of certain changes from or to a 52-53 week income year), then Section 24636(b) and this subsection do not supply.
(2) The term “12-month period” referred to in paragraph (1) of this subsection means the 12-month period beginning on the first day of the short period, However, if the taxpayer is not in existence at the end of such 12-month period, or if the taxpayer is a corporation which has disposed of substantially all of its assets before the end of such 12-month period, the term “12-month period” means the 12-month period ending at the close of the last day of the short period. For the purposes of the preceding sentence, a corporation which has ceased business and distributed so much of the assets used in its business that it cannot resume its customary operations with the remaining assets, will be considered to have disposed of substantially all of its assets, In the case of a change from a 52-53-week income year, the term “12-month period” means the period were an actual annual accounting period of 52 or 53 weeks (depending on the taxpayer's 52-52-week income year) beginning on the first day of the short period.
(3)(A) The net income for the 12-month period is computed under the some provisions of law as are applicable to the short period and is computed as if the 12-month period were an actual annual accounting period of the taxpayer. All items which fall in such 12--month period must be included even it they are extraordinary in amount or of an unusual nature. If the taxpayer is a member of a partnership, its net income for the 12-month period shall include its distributive share of partnership income for any taxable year of the partnership ending within or with such 12-month period, but no amount shall be included with respect to a taxable year of the partnership ending before or after such 12-month period. If any other item partially applicable to such 12-month period can be determined only at the end of an income year which includes only part of the 12-month period, the taxpayer, subject to review by the Franchise Tax Board, shall apportion such item to the 12-month period in such manner as will most clearly reflect income for the 12-month period.
(4) (A) A taxpayer who wishes to compute its tax for a short period resulting from a change of annual accounting period under Section 24636(b) must make an application therefor. Except as provided in (B) of this paragraph, the taxpayer shall first file its return for the short period and compute its tax under Section 24636(a). The application for the benefits of Section 24636(b) shall subsequently be made in the form of a claim for credit or refund. The claim shall set forth the computation of the net income and the tax thereon for the 12-month period and must be filed not later than the time (including extensions) prescribed for filing the return for the taxpayer's first income year which ends on or after the day which is 12 months after the beginning of the short period. For example, assume that a taxpayer changes its annual accounting period from the calendar year to a fiscal year ending September 30, and files a return for the short period from January 1, 1968, to September 30, 1968. Its application for the benefits of Section 24636(b) must be filed not later than the time prescribed for filing its return for its first income year which ends on or after the last day of December 1968, the twelfth month after the beginning of he short period. Thus, the taxpayer must file its application not later than the time prescribed for filing the return for its fiscal year ending September 30, 1969. If it obtains an extension of time for filing the return for such fiscal year, it may file its application during the period of such extension. If the Franchise Tax Board determines that the taxpayer has established the amount of its net income for the 12-month period, any excess of the tax paid for the short period over the tax computed under Section 24636(b) will be credited or refunded to the taxpayer in the same manner as in the case of an overpayment.
1. New section filed 3-31-70; effective thirtieth day thereafter (Register 70, No. 14).
[FN*]
Compare Section 26 CFR 1.443-1(b).