Excess deferral to 401k for 2019 taxes

Turbo tax says :

Report the excess deferral on your 2019 return in the Income section for Retirement Plans and Social Security whether or not you received a Form 1099-R before you file your return. Enter as much information as you can. Report the excess deferral amount in boxes 1 and 2a, and use code P in box 7. Indicate that this is a 2020 Form 1099-R.

 

How do we do this ? - All previous answers point to a bug ?

 

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