The United States Postal Service made an update to its postmark rule in 2025. It went into effect right before the year ended on December 24th, 2025. This update changes when the IRS will date the mail that they receive. I've seen people discussing how this will affect absentee voting ballots, medication, and even those who pay bills by mail. But my main concern is for you, the taxpayer, and how this will affect communication with the IRS. The IRS has a mailbox rule that they