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1099-K "Accepted with Errors": What IRIS TIN Mismatches Mean for Your Filing Deadline
August 4, 2026
Q. Now that IRIS performs real-time TIN and Name matching upon submission, what is the latest IRS guidance for 1099-K filings that are "Accepted with Errors" due to payee mismatches? Specifically, are filers expected to remediate these real-time mismatches before the March 31 electronic filing deadline?
Does IRIS require immediate remediation and resubmission of a payee TIN mismatch for that specific return to be considered timely and fully filed, or does this real-time error serve as an early…
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