CA Rev & Tax Code § 17207.6 (2021)
2021 California Code|Revenue and Taxation Code - RTC|DIVISION 2 - OTHER TAXES|PART 10 - PERSONAL INCOME TAX|CHAPTER 3 - Computation of Taxable Income|ARTICLE 6 - Deductions|Section 17207.6.

17207.6.  (a) An excess disaster loss, as defined in subdivision (c), shall be carried to other taxable years as provided in subdivision (b), with respect to losses resulting from any of the following disasters:(1) Any loss sustained in the Counties of Los Angeles and Monterey as a result of wildfires that commenced in August 2009.(2) Any loss sustained in the County of Placer as a result of wildfires that commenced in August 2009. (3) Any loss sustained in the Counties of Calaveras, Imperial, Los Angeles, Orange, Riverside, San Bernardino, San Francisco, and Siskiyou as a result of winter storms that commenced in January 2010. (4) Any loss sustained in the County of Kern as a result of the wildfires that commenced in July 2010. (b) (1) In the case of any loss allowed under Section 165(c) of the Internal Revenue Code, relating to limitation of losses of individuals, any excess disaster loss shall be carried forward to each of the five taxable years following the taxable year for which the loss is claimed. However, if there is any excess disaster loss remaining after the five-year period, then the applicable percentage, as set forth in paragraph (1) of subdivision (b) of Section 17276, of that excess disaster loss shall be carried forward to each of the next 10 taxable years.(2) The entire amount of any excess disaster loss as defined in subdivision (c) shall be carried to the earliest of the taxable years to which, by reason of subdivision (b), the loss may be carried. The portion of the loss which shall be carried to each of the other taxable years shall be the excess, if any, of the amount of excess disaster loss over the sum of the adjusted taxable income for each of the prior taxable years to which that excess disaster loss is carried.(c) “Excess disaster loss” means a disaster loss computed pursuant to Section 165 of the Internal Revenue Code which exceeds the adjusted taxable income of the year of loss or, if the election under Section 165(i) of the Internal Revenue Code is made, the adjusted taxable income of the year preceding the loss.(d) The provisions of this section and Section 165(i) of the Internal Revenue Code shall be applicable to any of the losses listed in subdivision (a) sustained in any county or city in this state which was proclaimed by the Governor to be in a state of disaster.(e) Losses allowable under this section may not be taken into account in computing a net operating loss deduction under Section 172 of the Internal Revenue Code.(f) For purposes of this section, “adjusted taxable income” shall be defined by Section 1212(b)(2)(B) of the Internal Revenue Code.(g) For losses described in subdivision (a), the election under Section 165(i) of the Internal Revenue Code may be made on a return or amended return filed on or before the due date of the return (determined with regard to extension) for the taxable year in which the disaster occurred. (Added by Stats. 2010, Ch. 447, Sec. 5. (AB 1662) Effective September 29, 2010.)