1099 NEC

I received a 1099-NEC from my employer for mileage reimbursements. When I run the error check, Turbo Tax keeps prompting me fill out schedule C with information I don't have, i.e. Principle Business Code, Business Name, Accounting Method, Material Participation Boxes, etc. I'm not self-employed and I don't have my own business. I'm not sure how to proceed. Any suggestions?