Investors & landlords

@sergeik 

This is not an "authoritative" answer - I have no cite for it - but I'd say entering the "trade" at a $0 gain/loss on Form 8949 would be a good approach.  You didn't trigger an IRS "audit", (in the formal sense), you triggered a computer-generated "no match" bit of correspondence.  Putting the trade on Form 8949 should satisfy the computer.