The IRS and TurboTax software will not accept a negative number in the Proceeds column of an IRS form 1099-B.
If negative numbers have been imported through your brokerage reports, you will need to edit the entries to make the correction.
Losses from expired options are reported by entering the loss amount as a positive number in the cost basis column and no amount in the proceeds column. The end result would then be a loss.
See also @ToddL99 here.
@stech
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