Payroll Service Providers
Companies listed here have passed the IRS Assurance Testing System (ATS) and/or Business Acceptance Testing (BATS) requirements for Software Developers, Reporting Agents, and Transmitters of electronic business returns to the IRS.

American Payroll Association
(APA) is the nation’s leader in payroll education, training, and publications. The nonprofit association conducts more than 300 payroll education conferences and seminars across the country each year and publishes a complete library of resource texts and newsletters.