Withdrew from 401k early and paid extra 10% at time of withdrawl -- how do I denote this in TurboTax

Hi, I withdrew early from 401k because of change of employment. It told me at the time I should withhold an extra 10% on top of the 20% automatically done because of taxes so I did that. Is this something that's automatically factored in when putting in my 1099-R on TurboTax or is there a field to specify this in...? I doublechecked my information was correct with my form and it says "Based on your entries so far, your extra tax bill is [amount] ..." I thought I would not owe because I already gave the 10% at withdraw. I got to the end of my filing and I'm not seeing anything showing [amount] is being deducted so I'm not sure if this is something that I have to pay outside of TurboTax. This is my first time doing this so I'm confused. Thank you.