Government Agencies
- Internal Revenue Service (IRS)
- IRS Factor Tables – 1 – 3% to 13% and 2 – 14 to 24%
- Securities and Exchange Commission (SEC) – Edgar
- State Government Websites
- State Tax Agencies
Professional Organizatons
- American Bar Association (ABA) Tax Section
- Accounting Today
- Association of International Certified Public Accountants (AICPA & CIMA)
- Federation of Tax Administrators
- National Association of State Chief Information Officers (NASCIO)
- Tax Notes