Extension Guide (extensionguide.com) is a free, independent reference on US federal, state, and local tax filing extensions. Nothing on this site constitutes legal, tax, or accounting advice, and no professional relationship is created by using this site. Content is provided for general informational purposes only.
Tax law, IRS guidance, and state and local rules change, sometimes without advance notice. Every deadline, form number, threshold, and address on this site is sourced from primary authority as of the date stated on each page, but readers should verify current requirements against the Internal Revenue Code, Treasury regulations, IRS guidance, and applicable state or local law before filing or relying on any information here.
This site is maintained on a best-efforts basis. Information may be incomplete, outdated, or inaccurate depending on subsequent changes in law or guidance. The site's maintainer disclaims liability to the fullest extent permitted by law for any loss or damage arising from reliance on this content.
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Extension Guide is maintained by the tk.cpa AI Lab as an independent public reference. It is not affiliated with, endorsed by, or operated on behalf of the Internal Revenue Service or any state, city, or local tax agency.