Internal Revenue Service is the federal agency that regulates and collects taxes from U.S. citizens and businesses. The IRS provides support and assistance to its constituents through its Web site. On its Web site, the IRS offers copies of its forms, answers to frequently asked questions, and information about its programs and services, among other topics.IRS WEBSITE
Payroll-Taxes.com offers small-business owners access to a database that includes information about state and federal labor laws, forms and unemployment rates. In addition, it contains articles about payroll issues and a payroll calculator.PARYROLL-TAXES.COM
U.S. state tax agencies are similar to the IRS but regulate taxes only in their states.