The U.S. Postal Service's new postmark process could lead to late fees and penalties when mailing time-sensitive documents if ...

To avoid late penalties or items being considered delinquent, the comptroller’s office recommends that Texans mail items early and use online systems, when available, to submit payments or reports.

USPS makes more changes to cut costs, improve service in 2026. Know how postmarks work to avoid late fees on bills, taxes.