I could have sworn that the 2024 program was/is available (and that we all have been using it for a while)

The dates at the top of the form should show year as 7/1/24 to 6/30/25 with the only fixed part of the date is the /24.

If you used Intuit to do a short yr 1/24 to 6/24 return then you will have issues with efile.

What did you put on the prior yr return for dates?

I believe you use the 2024 program

I did a short year last filing from 1/1/2024 to 6/30/2024, so the next filing will be 7/1/2024 to 6/30/2025 but if I wait until 2025 software is available the return will be late.

7/1/2024 to 6/30/2025 is a 2024 return and needs to be filed using 2024 software. You will probably need to file on paper because there is already a 2024 return (1/1/2024 to 6/30/2024) filed.