Errors in elective deferral due to excess contribution. I withdraw the excess amount and enter in Retirement plan and Social Security. but still won't allow me to e-file

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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.