Did TurboTax correct the software to allow efiling in case of excess salary deferral?
It was just announced that an update is currently planned for April 12th, 2019 to resolve this e-filing issue.
You may still see a warning about the excess contribution, but you should be able to e-file. You can check out thisTurboTax FAQ for more information: Excess 401(k) Contribution Preventing E-filing.
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