Massachusetts DOR Warns Taxpayers About New Postal Service Postmark Procedures

The Massachusetts Department of Revenue (DOR) warned taxpayers, preparers, and child support customers about recent changes to United States Postal Service procedures that could delay postmark dates for mail. The DOR said that as of December 2025, mail received at post offices may not be postmarked on the day of receipt, unless specifically requested at the retail counter. The DOR advised that to avoid any mailed tax return delays, taxpayers were encouraged to file and make payments electronically and said that MassTaxConnect, the DOR’s online system for filing returns and paying taxes, is available 24/7. [Mass. Dep’t of Revenue, Press ...