The total amount that I’ve withdrawn from 401K for covid was added to my total taxable income. IRS says we can spread this income in 3 years. How does it work?

Turbo tax 401k section says “you’ll need to revisit this area. The IRS instructions were not ready. When are they going to be ready to split 401K covid withdrawal in 3 years to avoid full amount to be added to my taxable income?