01/13/2026
Discover the crucial differences between postmarks and mailing dates for taxpayers. Ensure timely mailing and compliance with IRS rules today.
Taxpayers have long relied on postmarks as proof of timely mailing, and that hasn’t changed. The IRS continues to honor the “timely mailing equals timely filing” rule under Internal Revenue Code §7502: if your envelope is properly addressed, has sufficient postage, and is postmarked on or bef...