If you need additional time to file just click on the appropriate extension form below and file it by mail.
California Extension form 3539 for tax year 2017 is NOT available yet but will be on this page in January of 2018.
Business Extensions Federal
Business Extensions California
- 2017 Extension Form for CA returns 100, 100S, 199 and 109
- Form 3539 NOT available yet
Personal Extensions Federal