How do I fix my excess 401K contribution. TurboTax is not allowing to e-file the return. Its stuck on the "Check this entry" page for fixing the 12 b box.

[Rachel_W · Accepted solution]

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. 

If you haven't included the excess deferral in wages, please follow the steps in this link: How to Report Excess 401(K) Deferral in TurboTax Online.