USEFUL Links:

Internal Revenue Service
Form W4 - Employee Withholding Allowance Certificate
Form W9 - Request for Taxpayer Identification Number
Mileage rates
Small Business/Self Employed Tax Calendar
IRS Retention schedule

US Citizenship & Immigration Services
Form I9
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US Small Business Administration

CA Employment Development Departments
DE4 Employee's Withholding Allowance Certificate
Form DE34 - Report of New Employees
Form DE542 - Report of Independent Contractors
CA minimum wage

CA Department of Labor

CA Department of Tax and Fee Administration

Resources:

IRS tax tips

AB-5 Worker Status: Employees and Independent Contractors

AB-2557 AB5 update