Withheld amount in 1099-R is not reflected in 1040-X

I have to amend my 2023 tax return because I received a 1099-R with codes J and P.  The distribution was due to excessive contributions (I am under 59 1/2 years old).  The taxable amount on the 1099-R is $1676, and I had $403 withheld for federal taxes and $67 withheld for state taxes as indicated in boxes 4 and 14 respectively in the 1099-R form.  I logged into TurboTax online (website version) and proceeded to amend my 2023 return and entered my 1099-R form (I added the form manually).  However, in the generated 1040-X made by TurboTax, line 12 (withheld amount) is showing as $0. Is this an error? Because it is showing that I owe around $400 now, but in my head, this shouldn't be, because I had tax withhold as reflected on my 1099-R (even with the 10% penalty, this is too high).  I checked, and the taxable amount ($1676) in my 1099-R does not change my tax bracket.  Any help would be greatly appreciated.

 

Thank you,

-Paul