Learn about the new USPS postmark definition that could affect your tax return deadlines and how to avoid penalties from the IRS if you mail your tax return on April 15.

For years, Americans have relied on a deceptively simple idea: when something important is mailed, it’s considered timely once it is received by the post office. This principle—often called the ...

The United States Postal Service quietly changed how it applies postmarks, and that operational tweak could ripple straight into your tax bill. By shifting the postmark from the local counter to ...

A new USPS postmark rule could trip up last-minute filers: Postmarks now reflect when mail is processed by USPS, not when it’s dropped off—so mailing your return on April 15 doesn’t guarantee an April ...