Deductions & credits

If it's not income because it is personal use items sold at a loss, what form is the 1099k inputted on in the tax return?  I moved to a state with a $600 reporting threshold and I am now receiving the 1099k.  I realize you can't "deduct" the loss, I just dont want to pay tax on yard sale items that the IRS deems not taxable and I don't want to omit the 1099 and trigger an audit.