IRS and State Agency Consequences: The IRS and state agencies strictly use the postmark date to determine timeliness. A delay at a USPS facility could result in your filing being deemed late, ...
Self-service options are available in many retail lobbies when Post Offices are closed WASHINGTON, Feb. 3, 2026/PRNewswire/ -- The U.S. Postal Service will observe Presidents Day on Monday, Feb. 16.
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