When to File

Official source

Generally, if you filed federal Form 1040-X, Amended U.S. Individual Income Tax Return, file an amended California tax return within six months unless the changes do not affect your California tax liability. File an amended return only after you have filed your original or previously filed California tax return.

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When to File

Official source

Generally, if you filed federal Form 1040-X, Amended U.S. Individual Income Tax Return, file an amended California tax return within six months unless the changes do not affect your California tax liability. File an amended return only after you have filed your original or previously filed California tax return.