Schedule 1 numbers come from various places, since there are many different descriptions on Schedule 1. Can you let us know specifically what line you have information for that you'd like to report?
See: IRS Schedule 1
Amounts for Schedule 1 come from a variety of sources. Here is what Schedule 1 looks like:
https://www.irs.gov/pub/irs-pdf/f1040s1.pdf
You make the entries via the interview screens in the software.