California FTB Criminal Investigation Bureau fax

Where to fax a referral to the Franchise Tax Board's Criminal Investigation Bureau.

Verified October 22, 2026Checked against FTB 1240, California Franchise Tax Board Information Directory (Revised 03/2025).

California FTB Criminal Investigation Bureau fax: which number to use
Who uses it	Office	Fax
Referrals to the Criminal Investigation Bureau	FTB Criminal Investigation Bureau	916-227-2798

Before you fax

The directory also lists FTBCIBReferrals@ftb.ca.gov. To report suspected tax fraud, the FTB lists its Tax Informant Hotline, 800-540-3453.

Last verified October 22, 2026

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