Just delete the 1099-K that you entered and start over using these steps below. The description on line 21 will say 1099-K and the IRS can see that. Enter it under Wages & Income:
On Your 2017 Income Summary, scroll down click on Start next to Miscellaneous Income,
Then scroll down and choose Other reportable income
Answer Yes to "Any Other Taxable Income?"
Under Description put "Sales of Personal Property 1099-K"
Enter the amount from the 1099-K in the next box, click continue,
Click on "add another income item",
Under Description this time put "Cost of Personal Property 1099-K"
Enter the same amount but as a negative.
On the Other Miscellaneous Income Summary make sure you see the 2 items, one positive and one negative and Total is $0.
