Find out which tax forms and payments your business needs to file based on its structure and activities: Domestic corporations: Must file Form 100 (California Corporation Franchise or Income Tax ...

Realizing you made a mistake on your tax return? Don't panic. If you overlooked a valuable deduction, say, or forgot to report some of your income, you can simply file an amended return.

As hard as it may be to imagine, Californians have left millions of dollars in unclaimed tax refunds with the Internal Revenue Service. And if they don't act soon, that money will go to the ...