Leonard
Intuit Alumni

Business & farm

You can find the list of business codes used for Schedule C on page 17 & 18 for the 2018 Instructions for Schedule C.  The link below is to the instructions for 2018 Schedule C.  If you do not find an exact match you may use a code that is similar to your profession

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