Everyone who is filing a 2019 income tax return is using a Form 1040 so yes you can use it. If you are self-employed you will also include a schedule C for your expenses.
The tax forms for 2019 include a Form 1040 and three possible extra “Schedules”:
https://www.irs.gov/pub/irs-pdf/f1040.pdf
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
https://www.irs.gov/pub/irs-pdf/f1040s4.pdf