03/23/2026
Changes to Postmarking Procedures May Affect Mailing of Tax Forms – Did You Know?
The U.S. Postal Service (USPS) made an announcement in late December that may affect millions of people who mail tax forms or payments this filing season. In general, forms and payments sent by mail are considered to be on time if they are postmarked on or before the due date. Historically, mailed items were usually postmarked the same day they were handed to a postal employee, or deposited in a USPS drop box before the last scheduled pickup time.
However, the USPS is now in the process of consolidating mail processing activities down to just 60 regional sorting locations, with a limited number of truck deliveries to those facilities daily. Since most mailed items will not get postmarked until they arrive at one of the 60 locations, many postmarks will show a date several days after the item was originally mailed. These changes are especially likely to affect rural communities, many of which will now be hundreds of miles from the nearest processing facility.
Therefore, anyone who needs to send tax documents through the mail should play it safe by dropping parcels off at a post office or collection facility at least a week before the IRS deadline. As an alternative, consider e-filing tax forms whenever possible. A tax professional can help you securely submit your return, other IRS document or tax payment electronically for fast, verified delivery.