"but the form does not exist in the search."

The form 1099-LS is not necessarily reportable. It's the scenario that applies which may be reportable. There might be ordinary income, capital gain, capital loss, or it might be a viatical sale. That's why you would read the resources and links provided, to evaluate what applies.

If it is not reportable, there is nothing to be entered. Otherwise, there is a worksheet, not a form, for the data.