Below are some links that you might find helpful in day-to-day business.

Bureau of Labor and Industries –
Employee Form W-4 –
Oregon W4 –
Federal Electronic Tax Payment System –
Form I-9: Employment Eligibility Verification –
Form W-9: Request for Taxpayer ID Number –
Oregon Business Guide –
Oregon Electronic Tax Payment System –
Oregon Prevailing Wages Rates –
Publication 15: Federal Income Tax Tables –
SAIF Corporation: Worker’s Compensation Insurance –
Tax Withholding Estimator –
U.S. Equal Employment Opportunity Commission –
U.S. Department of Labor –
Oregon Board of Tax Practitioners –
What is an enrolled Agent?
Social Security –