Care act 401k paying back over 3 years, doesn’t seem to split withholding into 3 years

Hello,

 

I took out 40k on a 401k withdrawal last year due to Covid. TurboTax now allows me to input my 1099-r as a Covid withdrawal and split it up into 3 years.

my issue is I withheld $4,000 federal taxes (10%) when I withdrew it. Is there a way to split my withholding into 3 years as well? It seems to be splitting my withdrawal 3 ways ($13,333) but having my entire withholding only be on this years taxes. So I’m getting a ton back this year but I assume my next 2 years won’t be so nice. 

Thankyou in advance! Hopefully I’m just missing something.