You can do it another way that won't affect your Massachusetts taxes. Enter it under Wages & Income, Your 2017 Income Summary, scroll down click on Start next to Miscellaneous Income, then choose Other reportable income, answer Yes to "Any Other Taxable Income?" Under Description put "Sales of Personal Property 1099-K" and enter the amount from the 1099-K in the next box, click continue, click on "add another income item", Under Description put "Cost of Personal Property 1099-K" and enter the same amount 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.
