So I had the same issue. I had paid for "live support" and got a real CPA to help me through it. I thought it was a software issue, but it turned out to be a real tax effort. The new tax code does not recognize "negative" sales. I was taking an $8,500 loss on a contract that former client skipped out on... and was showing it as a loss in income. She had me put it in "misc. expenses" as a positive number. The error went away. She also said showing it as an expense, rather than a "negative sale" is less likely to draw attention.
