401k Distribution

My tax circumstances have changed for 2024. Trying to find a way to stay in the 12% bracket and max out a 401k withdraw. Is there some estimator calculator to figure the max amount for 2024? This year, Head of Household, unemployment $6400, SS $15,000, Farm Loss let's say -$5000. Wouldn't mind subscribing to live advice but looks like  it isn't available till December.

Thanks