TurboTax Premier 2023 version WinPerRelease 23.000.321: Federal Taxes --> Deductions & Credits --> "Tell us about anything spent on medical travel" -- The field for "Miles driven to get medical care" will not allow any entry, then complains that "Value must be greater than 0." I had entered into the details dialog for the field the miles driven during the year to 9 separate medical facilities, so nine lines that automatically added up to 1,857 miles. Normally, the details dialog would feed the number to the parent field, but it is not working in this case.
Addendum: I went to the relevant form (Schedule A) in the form view, to enter the value there, and the total from the item worksheet had fed properly to the relevant Schedule A field. So, the issue is with the display interface in the step-by-step interview screens.
Addendum 3: I saved the TurboTax file, then restarted TurboTax and navigated back to the problem screen and the field was populated properly. So it may be annoying behavior, but it somehow sorted itself out. Not sure which of my maneuvers fixed it, though.