You can't enter a 1099-R for 2024 in your 2023 tax return. If Fidelity reported it as a 2024 distribution you have to enter it in your 2024 tax return.
Why did Fidelity report it as a 2024 distribution? Did you submit the order at the end of December 2023 and it didn't get processed until January? Check your statements covering December 2023 and January 2024. What date does the statement show for the distribution? The date that matters is when the distribution was actually paid out, not the date that you submitted the order.
If you sold securities in an IRA and distributed the cash proceeds, the cash might not have been distributed until the business day after the sale.
