Internal Revenue Service – www.irs.gov
Information regarding federal business income taxes, employers federal withholding
requirements, federal unemployment, forms and publications, and much more.
Illinois Department of Revenue – www.iltax.com
Information regarding state business income taxes (for companies doing business
in Illinois), sales tax, employers state withholding, forms, and much more.
Illinois Department of Employment Security – www.ides.state.il.us
Information regarding state unemployment, forms, and more.
QuickBooks - www.intuit.com
The most widely used financial software for small and medium sized businesses.