I'm getting a 1099-K from an event ticket app for selling a set concert tickets that I couldn't use, but I sold for a loss. Where in the Turbo Tax software do I record this loss when I am doing my taxes?

Dear Paratroop1969, 

Hope you are having a good day! The IRS has specific rules for hobby activities and sole proprietors (businesses). In order to report the loss on the sale of your ticket, you have to conclude if this is a hobby or a business. If it is a hobby, then you would report the income on your 1099-K on Schedule I, Line 8 of your 1040. Unfortunately, under the new Tax Reform, you cannot deduct expenses related to that 1099-K income. 

On the other hand, if you are in business of selling tickets and for profit, you would report income on Schedule C along with the expenses related to that income. Please review this Hobby vs Business  and hope it helps you! 

Please let us know if you have additional questions.