Implementation of the Withhold at Source System (WASS)

FTB Archive Disclaimer:  Archived content is not current and may contain broken links. It remains online for historical reference or research. The search function above allows you to search archived and current content separately. If you need archived content in a different format, contact us.

Purpose of bulletin

To inform staff beginning August 29, 2011, the new Withhold at Source System (WASS) will start to process all non-wage withholding forms and payments.


The Withholding Services and Compliance Section administers the nonwage withholding program, which includes real estate, resident, nonresident, and backup withholding.

The current withholding system no longer provides the flexibility to process withholding forms and payments and will be replaced with the Withhold at Source System (WASS).

The WASS is one comprehensive system that will interface with TI, BETS, and ICBS to automate penalty assessments and create electronic filing options.

Additional Information

The primary staff of WSCS, Fiscal, ICBS, and Advocate will receive system access upon implementation.

Additional staff with the need to use WASS will receive system access and training at a later date.

Taxpayer Inquiries

For more information on forms and processing changes as a result of the WASS implementation, go to, and search for withholding forms and payments.

Taxpayers can call us at 888.792.4900 or 916.845.4900 (if outside the United States), Weekdays, 8 a.m. to 5 p.m., except state holidays.


Is there something wrong with this page?

Help us improve our website

Don't include social security numbers or other personal/confidential information.


You are leaving

We do not control the destination site and cannot accept any responsibility for its contents, links, or offers. Review the site's security and confidentiality statements before using the site.

If you have any issues or technical problems, contact that site for assistance.

Ahora está saliendo de

Nosotros no controlamos el sitio web al que se destina y no podemos aceptar ninguna responsabilidad por su contenido, enlaces, u ofertas. Revise las declaraciones de seguridad y confidencialidad del sitio antes de usar el sitio. Si tiene algún problema en general o técnico, comuníquese con ese sitio para obtener asistencia.

Si tiene algún problema en general o técnico, comuníquese con ese sitio para obtener asistencia.