Form 4868 is the IRS application for an automatic 6-month extension to file your U.S. individual income tax return (like Form 1040), but any taxes owed are still due by the original deadline, typically April 15. Mailing a paper version requires sending it to specific IRS addresses based on your location and whether you're enclosing a payment. These addresses are detailed on the official Form 4868 instructions from the IRS.

Mailing Addresses by Location

The IRS divides addresses by state groups, payment status, and filer type (e.g., U.S. residents vs. foreign). Always verify the latest on IRS.gov, as addresses can update yearly. Here's a breakdown from the 2025 Form 4868 guidance:

If you live in: With payment Without payment
Alabama, Georgia, Kentucky, New Jersey, North Carolina, South Carolina, Tennessee, Virginia P.O. Box 1302, Charlotte, NC 28201-1302 Austin, TX 73301-0045
Arizona, New Mexico P.O. Box 82503, Cincinnati, OH 45280-2503 Austin, TX 73301-0045
Connecticut, Delaware, D.C., Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Minnesota, Missouri, New Hampshire, New York, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin P.O. Box 931300, Louisville, KY 40293-1300 Kansas City, MO 64999-0045
Alaska, California, Colorado, Hawaii, Idaho, Kansas, Michigan, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wyoming P.O. Box 82503, Cincinnati, OH 45280-2503 Ogden, UT 84201-0045
Arkansas, Oklahoma P.O. Box 931300, Louisville, KY 40293-1300 Austin, TX 73301-0045
Texas, Florida P.O. Box 1302, Charlotte, NC 28201-1302 Austin, TX 73301-0045
Foreign country, excluding income under section 933, dual-status alien P.O. Box 1303, Charlotte, NC 28201-1303 USA Austin, TX 73301-0045 USA

Key Tips for Filing

  • Postmark deadline : Must be mailed by April 15 (or the next business day). Use certified mail for proof.
  • Payment : Make check payable to "United States Treasury." Write your SSN, "Form 4868," and "2025" on it.
  • E-file alternative : Preferred for faster processing; use IRS Free File or tax software—no paper needed.
  • Download form : Get the latest PDF at IRS.gov/forms-pubs/about-form-4868.

Common Pitfalls to Avoid

  • Wrong address delays approval—double-check your state grouping.
  • Extension to file ≠ extension to pay; interest/penalties accrue on unpaid taxes.
  • For 2025 taxes (filed in 2026), confirm updates as President Trump's administration may tweak processes, though core addresses hold steady so far.

TL;DR : Mail paper Form 4868 to the IRS P.O. Box for your state/payment status per the table above; e-file if possible for simplicity.

Information gathered from public forums or data available on the internet and portrayed here.