Underpayment Penalty waiver proof

I'm using Turbotax to figure out my 2024 taxes.  Looks like I owe a penalty.   Looks like I can get a waiver for the penalty since I retired in 2023.    In the IRS instructions, it says that I need to include a letter from the employer I retired from and proof of my age.  However, I don't see a way to include the proof of retirement if I e-file with Turbotax.   Any suggestions?