For 2019 they changed the line numbers and schedules again. There is no schedule 4. Just schedules 1-3 now.
2019 Schedules 1-3
https://www.irs.gov/pub/irs-pdf/f1040s1.pdf
https://www.irs.gov/pub/irs-pdf/f1040s2.pdf
https://www.irs.gov/pub/irs-pdf/f1040s3.pdf
How much is your Interest or Dividends? You only get schedule B if either one is over $1,500. Not combined.
