If you don't have a copy of a signed W-9 on the most current IRS form, please fill out a W-9 here and upload below.
Find out more about California's requirement to withhold tax from certain payments to nonresidents on the Franchise Tax Board website. If you did not provide a physical address within the state of CA, you will need to complete and upload Form 587, Form 590, or a Form 588 Waiver
Download Form 587 Nonresident Withholding Allocation Worksheet (2025) and upload the completed form below.
Download Form 590 Withholding Exemption Certificate (2025) and upload the completed form below.
Download Form 588 Nonresident Withholding Waiver Request (2025) and submit the completed form directly to the Franchise Tax Board. If you are granted a withholding waiver, please upload a copy of that below.
Download Form W-8BEN-E Certificate of Status of Beneficial Owner for United States Tax Withholding and Reporting (Entities) and upload the completed form below.
Download Form W-8BEN Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals) and upload the completed form below.
The County of Marin recognizes the following small business certifications:
If you would like to self-report your business's certification for one of the above designations, please select the type from the list below and provide the certificate details below.
If you need further assistance in completing this form, please call Department of Finance at (415) 473-6156. Request for accommodation may be made by calling (415) 473-4381 (Voice/TTY), 711 for California Relay Service or by e-mail at disabilityaccess@marincounty.gov. Copies of documents are available in alternative formats, upon request.