I am assuming this is a business of sorts you are running. At the very minimum selling items on the internet. Rather than be confused by whether the 1099K was also included elsewhere, I would record the activity directly on the schedule c.
- Go to self employment income and expenses
- enter the business information
- total up all of the money received in sales (make sure it is at least as much as your 1099-K's combined). The part where they ask the type of income received, like 1099K, 1099 Misc, just type in cash and enter the amount.
- record the expenses associated with it, such as the value of the items you sold.
