Retirement tax questions

You can put the excess contribution amount down as Misc income and label it "excess deferral."  That said, it will not reconcile with the W2s showing excess contributions.  The TurboTax review will show that as an error and not let your proceed with a clean return.  Turbotax needs to somehow have 1099 Misc for excess deferrals offset the excess on the W2s at least for a clean review.