At the end of this pub you will see business codes. Don’t worry if nothing matches exactly what he did. Pick the closest description.
https://www.irs.gov/pub/irs-prior/i1040sc--2018.pdf
Very few businesses do not qualify for QBI so I think it’s safe to say his qualifies
He materially participates and is on a cash basis.
Yes, employer EIN is the same.
There are no other gross receipts so add nothing to the 1099-misc income.
