Thanks for the clarification. I was concerned that the IRS would receive a copy of the 1099-K and then not be able to find the corresponding amount on my return. I didn't click the checkbox under line 1a during the TT interview, because I thought it only applied to incorrect 1099-K amounts - that was my mistake.
I've already prepared the full 8949 form showing every personal sale transaction and since I have some investment capital gains/losses that legitimately need to go on the 8949, I probably will submit the 8949 with all the personal sale items (corrected to zero loss) anyway. That should satisfy any curiosity by the IRS.
