Trying to complete 1099-MISC for husband music performance and it is making me fill out schedule C and business info. He is independent. there is no business code.

He played with a band and was handed a 1099-MISC that I'm trying to record.  There is no business code that we have.  how can I get this completed accurately.  total is 650.  Does this mean that his music is a side small business now?