U.S. Organizations and Governmental Agencies
Internal Revenue Service
Social Security Administration
Department of Labor

CA
California Franchise Tax Board

NC
N.C. State Board of Certified Public Accountant Examiners
N.C. Department of Revenue
N.C. Secretary of State
N.C. Employment Security Commission

SC
S.C. Department of Revenue

NJ
N.J. Division of Revenue
N.J. Division of Taxation - Electronic Services

TN
TN Department of Revenue

VA
Virginia Department of Taxation

Calculators:
Amortization Calculator

Resource Links courtesy of:
Joseph R. Listman, CPA, PC