Section 20639.8.

Cal. Revenue and Taxation Code - RTC § 20639.8.
in effect
Sign in to generate a plain English summaryAsk Belisarius Agent
The claim for postponement shall be filed after October 1 of the fiscal year in which the postponement is claimed and on or before February 10 of that fiscal year. If February 10 falls on Saturday, Sunday, or a legal holiday, the date is extended to the next business day.
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