If you have income reported in Box 7 of Form 1099-misc, the IRS considers this to be self-employment income and it is reported on Schedule C.
7. Shows nonemployee compensation. If you are in the trade or business of
catching fish, box 7 may show cash you received for the sale of fish. If the
amount in this box is SE income, report it on Schedule C or F (Form 1040), and
complete Schedule SE (Form 1040). You received this form instead of Form W-2
because the payer did not consider you an employee and did not withhold income
tax or social security and Medicare tax.