When all else fails, read the instructions.

https://www.irs.gov/pub/irs-pdf/i1040sc.pdf

Hint: 17, 23 and 26 are popular for these types of things. Look at where the ended up in those other acronyms you used. Make this Sch C look like the other. PCT has the ability to check the return, look at the form then click on a blue highlighted line or box and jump to the input for that line or box.