Section 23058.

Cal. Revenue and Taxation Code - RTC § 23058.
in effect
Sign in to generate a plain English summaryAsk Belisarius Agent
Unless otherwise specifically provided therein, the provisions of any act: (a) That affect the imposition or computation of tax, penalties, or the allowance of credits against the tax, shall be applied to taxable years beginning on or after January 1 of the year in which the act takes effect. (b) That otherwise affect the provisions of this part shall be applied on and after the date the act takes effect.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

Starting a business in California? California LLC guide: costs and requirements