That is not a "fix". Reporting the excess 401(k) deferral as 2018 income only negates the need to amend 2018 next year after the actual 1099-R arrives. The e-file issue has to do with the excess reported on the W-2. Nothing that you can do will fix that since it is a TurboTax bug. The 4/5 update changed this but did not fix the e-file reject. There is a new update on 4/12 that is supposed to fix the e-file issue whether you report the excess not not.
https://ttlc.intuit.com/questions/4698409-excess-401-k-contribution-preventing-e-file
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
