A Federal-State Cooperative Publication
Publication 963 — Federal - State Reference Guide: A Federal-State Cooperative Publication · 2026-10-03 edition · updated 2026-10-04 · United States
Social Security Administration
Internal Revenue Service
National Conference of State Social Security Administrators
Providing guidelines for Social Security and Medicare
coverage and tax withholding requirements for state,
local and Indian tribal government employees and
public employers.
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