Hello Meg08,
Since you are already filing a schedule C for the books you sell and this is an unrelated business or hobby, you would either need to file a second schedule C for product testing or file the 1099 as hobby income. Based on the below article you would need to go through the questions and see if this qualifies for a business or as a hobby.
https://turbotax.intuit.com/tax-tips/small-business-taxes/when-the-irs-classifies-your-business-as-a...
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
