You had an RMD that you must take sometime during 2024, before 12/31/24. That RMD is based on the value in the account as of 12/31/23, and a formula based on your life expectancy. (But note that the formula for an inherited IRA is different than for your own IRA.)
So, if you withdrew all the funds in the IRA as of 3/29/24, you must consider that part of the withdrawn funds were the RMD for 2024. Turbotax wants to know this because there are certain things you can't do with the RMD portion of the withdrawal, such as contribute them to a new IRA in your own name. This won't be an issue as long as you had earnings from work of more than $8000 for 2024, so that any new IRA contributions came from work instead of from the RMD.
You can answer "all of the funds were the RMD" and that won't change your tax return as long as your earnings from work are more than your new IRA contribution, if any. Or you can answer with the correct amount (maybe the whole withdrawal was $10,000 and the RMD portion was $1500, so answer that way.)
Also, remember that your RMD from an inherited IRA is separate from, and calculated separately from, the RMD from any IRAs in your own name (if you are of the age where RMDs are required.)
