The system is saying that Line 1b(2) entry of 1/1/2024 is incorrect since it is more than 366 days. 2024 was a leap year and this is correct. How do you fix?

@kmdual  which form are you referring to  ?  2555 or what ?  Need help here -- we cannot see your  return / screen.

The error is indicating that the number of days calculated is more than 366. Since 2024 was a leap year, this number of days can be up to 366, but not more than that.