Following are some links you might find useful. Please let us know if you have recommendations for other links.

ADP Small Business Payroll Processing: http://www.sbs.adp.com/

Sage Software: http://www.sagesoftware.com/

BusinessWorks accounting software: www.sagesoftware.com/businessworks

College of DuPage: http://www.cod.edu/

CompuPay Payroll Processing: http://www.compupay.com/

Illinois Department of Revenue: http://www.revenue.state.il.us/

Internal Revenue Service: http://www.irs.gov/

Intuit: http://www.intuit.com/

Community Business Alliance:  www.communitybusinessalliance.com/

Naperville Chamber of Commerce: www.naperville.net/

CPA Connect: www.cpaconnect.com/

Ilinois CPA Society: www.icpas.org/

American Institute of CPAs:  www.aicpa.org/