Indiana DOR: USPS Postmark Changes Impact Tax Timeliness

Tue, 17 Mar 2026 15:31:22 +0000
Taxation

The Indiana Department of Revenue (DOR) has issued a notice regarding changes to USPS postmark rules. These changes could impact the timeliness of tax filings and payments, potentially leading to late fees. The DOR recommends using its online portal, INTIME, or requesting a manual postmark for mailed items.