Over contrib to 401K. followed instructions to report addl income. stuck in loop after "transmit returns now" pointing to over contribution on Form 1040.

[mpallot]

over contributed to 401K with job change. I followed the instructions to record addl income.  Now trying to file my return and I am stuck in a loop after I press "transmit returns now" that goes to "we need to make one more check" that points out that I have over contributed to my 401K on Form 1040 which is not filed.

[Rachel_W]

You have taken the right steps including the excess deferral on your 2018 Tax Return.

At this point, I think you are running into an e-filing issue within TurboTax.  An update to fix the issue is expected to be released around 4/5/2019.  You can check out this TurboTax FAQ for more information: Excess 401(k) Contribution Preventing E-filing.

Be sure to sign up for updates to be alerted as soon as there is a solution.  If you do not want to wait for an update, you have the option to paper file your tax returns as this is only an e-filing issue.