
USPS Postmark Delays: What Taxpayers Need to Know When Mailing a Return
Mailing a tax return or payment close to the deadline may be riskier than many taxpayers realize. Because the IRS relies on the postmark date to determine whether something was filed on time, recent changes to how the USPS applies postmarks could result in a later date than when you actually mailed it. To avoid potential penalties or delays, it’s important to plan ahead and use mailing methods that provide clear proof of when your documents were sent.







