Most Requested Forms I-9 Employment Verification W-4 Employees Withholding Allowance Certificate (Federal) W-9 Request for Tax Payer Identification Number (Federal) W-9 Info Request (Sample Letter) Margin & Markup Table DE542 Report of Independent Contractors California Resale Certificate Requested Publications Employers Federal Tax Guide California Employers Guide California City and County Sales and Use Tax Rates Employment Determination Guide Links Internal Revenue Service California Employment Development Department CA Dept of Tax and Fee Administration California Franchise Tax Board California Labor Department California Secretary of State W4 Calculator