Turbotax needs to know the amount that was the required distribution because there are certain things you can't do with that part of the money (like roll it over into another IRA). It won't have any effect in the future.
If the father died in 2024 and was older than his beginning age, and had not withdrawn his own RMD yet, then your wife was required to take his RMD. His RMD would be the balance as of 12/31/2023 divided by his life expectancy factor from Appendix B, Table III, page 65 of IRS publication 590-B.
https://www.irs.gov/pub/irs-pdf/p590b.pdf
In any other situation, your wife's RMD for 2024 was zero, either because she had no requirement, or because the IRS waived the requirement. It depends on several facts but I won't go into them unless you ask, since either way it would be zero for 2024.
