IDOR alerts taxpayers to postal service changes that could impact tax filings
CHICAGO. IL- The Illinois Department of Revenue (IDOR) is alerting taxpayers that changes announced by the United States Postal Service (USPS) regarding postmarks could impact tax filings in 2026. While the USPS postmark will still show the date of the first automated processing operation, the postmark may no longer reflect the date when the piece […]
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