Thank you, that did the trick. Line 19 was blank, and there was no error message prompting me to enter a value.  I assumed that, because their AGI was too high for the second stimulus payment, that the program automatically assumed it was 0, but I did need to enter the 0.

Now the $458 credit appears.

This is a minor bug in the program.  Not sure why, before I do anything with this worksheet, an empty Line 16 triggers an error alert, but an empty Line 19 does not.  If I need to enter a value into Line 19, then an error alert should appear until I enter a value there.

Nevertheless, thank you!