Is there a 2024 form1040-SR for seniors?

Yes, there is a Form 1040-SR for 2024. If you are 65 or older TurboTax will automatically print Form 1040-SR instead of Form 1040.

Note that the only difference between Form 1040 and Form 1040-SR is that Form 1040-SR has bigger print. The content of the two forms and the tax calculations are exactly the same.

When you print it will print on the 1040SR even if you see only the 1040 on the screen.  You automatically get the 1040SR if you or your spouse is 65 or older.  In the Desktop program you can tell it which one to print.  

Both the 1040 and 1040-SR use the same instructions and tax calculations.

IRS 1040 and 1040-SR Instructions

https://www.irs.gov/pub/irs-pdf/i1040gi.pdf