In my 2023 i applied all my refund (Say $X) to 2024. I did itemized deductions in 2023.
Turbotax 2024 carried that forward to 2024 correctly.
Now in 2024 i received 1099g from CA for amount $Y. $Y is much less than $X.
When i go thru the interview and click update the CA refund it does not ask me to enter the new 1099G.
Now i could just add $X and $Y and enter it - but that would be incorrect - my refund was $X.
I noticed is the the amount $Y is very close to what turbo tax calculated for amount applied to column C (on State and local income tax worksheet).
I also tried to delete the entry and go thru the interview. Here I have to enter the larger amount $X and nowhere did it ask me to enter the smaller amount of $Y.
