From the California Franchise Tax Board:
Franchise Tax Board News Release
Franchise Tax Board Contacting Income Tax Nonfilers
SACRAMENTO– More than one million people who did not file a 2012 state income tax return are receiving letters seeking those returns or to verify that they do not have a tax filing requirement, according to the Franchise Tax Board (FTB).
Since the 1950s, FTB has contacted people who have California income, but did not file a tax return. Last year, FTB collected more than $727 million through these efforts.
Each year FTB receives more than 400 million income records from third parties such as banks, employers, state departments, the IRS, and other sources. FTB matches these income records against its records of tax returns filed. While this program mainly identifies wage earners and self-employed individuals who have not filed, it also detects other nonfilers through information sources such as occupational licenses and mortgage interest payments.
Those contacted have 30 days to file a state tax return or show why one is not due. For people who do not respond, FTB issues a tax assessment using income records to estimate the amount of state tax due. The assessment includes interest, fees, and penalties that can total up to 50 percent of the tax.
FTB provides more information for those receiving a letter at ftb.ca.gov. Taxpayers can search for: Respond to request/demand for tax return. Using this online service, individuals can request more time to reply, retrieve information that can assist in filing a tax return, request tax forms, learn about payment options, sign up to receive an email reminder to file, and access other services. They can also call FTB at 866.204.7902 for help.
The extended deadline to file a 2012 state tax return was October 15, 2013. Last year, California taxpayers filed more than 16 million tax returns.