No, investment expenses should not be listed as gross proceeds. I suggest re-checking a PDF copy of Form 1099-B to verify the accuracy of the import.
For more details, see:
How do I import my 1099?
How do I update or delete something I imported into TurboTax?
Troubleshoot TurboTax for Windows updating issues
IRS Publication 550 Investment Income and Expenses page 35 How to Report Investment Interest Expense
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