04/11/2026
With tax day being this upcoming Wednesday, April 15th, it is important to understand the recent changes to how the USPS handles postmarking mail.
As of December 24, 2025, the USPS updated its postmarking rules (DMM 608.11) to reflect the date mail is first processed by an automated machine at a regional facility, rather than the date it was dropped off. This means the postmark may be dated 1-3 days after mailing, creating risks for deadlines.
We recommend that if you are planning to send your tax returns this week that you have them sent "certified" mail so that you are given an instant, electronic date of mailing to avoid issues with the new postmark system.
If you have questions, our staff is happy to assist as best as we can!
Dates on mail now reflect when it’s processed, not when it’s dropped off