After you file

As long as you request the return of the excess (or applying it to 2019) before the due date of your return, you do not have to amend your 2018 tax return.  Keep a record of how you contacted the plan administrator (written request, email or even the date/time you called to request) just in case

**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"