Schedule C is appropriate if you're in the business of taking surveys. As the IRS puts it, Use Schedule C (Form 1040) to report income or loss from a business you operated or a profession you practiced as a sole proprietor.
If you're not in the business of taking surveys, just report the income as "Other Income" on Form 1040, Schedule 1.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
