WorldatWork - Formerly known as the American Compensation Association.  WorldatWork is a not-for-profit association of more than 25,000 human resource practitioners who design and manage employee compensation and benefit programs in their respective organizations.

US Immigration and Naturalization Services - The best source to research INS rules and regulations and to obtain compliance forms.

State Electronic Fund Transfers - Links to each state that has or is implementing EFT for payroll taxes.

American Payroll Association - The American Payroll Association is the professional society for Payroll Professionals. The Association works to increase the payroll professional's skill level through education and mutual support.

Tax Compliance Calendar (APA) - A daily guide to tax compliance and deposit dates.

American Society for Payroll Management - The ASPM is dedicated to providing the payroll managers of large U.S. corporations with a forum to obtain the latest information on payroll industry best practices, to remain current regarding the constant evolution of payroll technology and to stay abreast of federal and state legislative actions that may affect their companies.

State Labor Dept Links (ASPM) - Links to all of the state labor departments.

Federation of Tax Administrators - The FTA was organized in 1937. Its mission is to improve the quality of state tax administration by providing services to state tax authorities and administrators.