When filing ACA data through the IRS AIR system, you may encounter the AIRER602 payload attachment error (MTOM). This error typically means the IRS system was unable to read the attachment that was transmitted.
Why the AIRER602 Error Happens
On June 22, 2016, the IRS posted an update noting that AIRER602 errors may occur when a transmission is rejected without an error data file or error code. The IRS also confirmed that it was investigating internal system issues that could cause this error.
How to Fix the AIRER602 Error
If you receive the AIRER602 MTOM payload attachment error, take the following steps:
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Verify that your transmission complies with IRS Publication 5165, Sections 4.2 and 4.3.
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Ensure that your XML file and attachments are properly formatted and encoded before resubmission.
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If your transmission was rejected without an error code or error data file, follow the IRS guidance in the Known Issue Report.
How 1099FIRE Can Help
Filing ACA forms can be complicated, especially when IRS error codes appear. At 1099FIRE, we specialize in ACA reporting and electronic filing. Our team can:
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Prepare and e-file your 1094 and 1095 forms through the IRS AIR system.
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Review and correct XML file formatting issues that trigger errors like AIRER602.
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Act as your transmitter, using our IRS-approved TCC number to file on your behalf.
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Provide expert support to resolve rejects quickly and keep your business compliant.
If you’re struggling with ACA filing errors, contact our sales team at info@1099fire.com or call 480-460-9311. We’ll help you fix the problem and get your ACA forms accepted by the IRS.