The issue is reporting negative amounts in the proceeds box, which is impossible in TurboTax without an error message. It is not about reporting wash sales.
Today, I loaded my 1099-B from Fidelity Investments into TurboTax 2020. As expected, Fidelity reported losses from option sales as negative amounts in the proceeds box, generating the error message in TurboTax. I called Fidelity and was told that they adhere to the strict rules they get every year from the IRS concerning 1099-B forms. I asked why they recommended TurboTax (with a 20 % reduction) if that software does not accept their data on a 1099-B. They said they will report it to the right department within Fidelity, which department should contact Intuit about this issue. This might happen on Tuesday, after the long weekend.
