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- The IRS Is Moving E-File Security Upstream
The IRS Is Moving E-File Security Upstream
New API checks mean the filing-season problem may start inside the software setup, not the tax return.
Hannah Olsen
August 26, 2026
The next e-file mess may not look like a rejected return. It may look like a vendor registration, EFIN validation, or transmitter setup that nobody checked until January.
That is the real warning inside the latest IRS technology changes.
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