When filing Affordable Care Act (ACA) forms electronically through the IRS AIR system, you may encounter the error code AIRMF3014. This rejection means:
Manifest ‘ChecksumAugmentationNum’ must not match a ‘ChecksumAugmentationNum’ of any AIR transmission from the same TCC previously accepted.
In simple terms, the IRS believes you are trying to upload the same file twice.
Why This Happens
When you create a manifest file, two unique identifiers are generated:
-
UUID (Universally Unique Identifier)
-
Found near the top of the manifest file.
-
A 32-character lowercase string automatically generated each time you create a new manifest.
-
Example:
-
Purpose: Ensures no two submissions have the same ID.
-
-
ChecksumAugmentationNum (Checksum)
-
Found near the bottom of the manifest file.
-
Another 32-character string created from the contents of your data file.
-
If you upload the same file without changes, the checksum will be identical — triggering error AIRMF3014.
-
How to Fix AIRMF3014
-
Check for true duplicates: If you really tried to resubmit the same file, you’ll need to modify and regenerate it before sending again.
-
Make slight changes: Updating the data file (for example, adjusting records or metadata) forces a new checksum.
-
Regenerate the checksum: If your replacement file is slightly different but still rejected, regenerate a new checksum string to ensure uniqueness.
Key Takeaway
The AIRMF3014 rejection occurs when the IRS system thinks you’re sending a duplicate file. By ensuring your UUID and ChecksumAugmentationNum are unique for each transmission, you can prevent this error and keep your ACA filings moving smoothly.
👉 Related guides: