TurboTax will populate Form 4972 for you once you enter your retirement plan withdrawal, and if you meet a series of special requirements.
If you have a large retirement plan balance, taking a lump-sum could trigger significant tax consequences. However, IRS Form 4972 allows you to claim preferential tax treatment if you meet a series of special requirements. The biggest requirement is that you have to be born before January 2, 1936.
Please click the links below for more information.
https://turbotax.intuit.com/tax-tips/investments-and-taxes/what-is-form-4972-tax-on-lump-sum-distrib...
https://www.irs.gov/pub/irs-pdf/f4972.pdf