TurboTax is aware of this e-file issue and is working towards a
solution. 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
this TurboTax FAQ for more information: Excess
401(k) Contribution Preventing E-filing.
