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This is happening again as of Jan 31, 2026.
FAILED_VALIDATION: Error Code 54
This version of TurboTax is no longer current. You must ... blah blah Check for Updates and then you can e-file.
Can not
If you can’t update your Windows program try doing a Manually update. Don't know if it's only for personal programs or for Business too.
https://ttlc.intuit.com/community/updating/help/manually-update-turbotax-for-windows-software-basic-...
I just got the same error in TT Business. I downloaded and installed the manual patch and got the same error again.
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