@ngozman That's not true. I have been doing it all morning. I have 186 of these showing as negative in the Proceeds field. I cannot post a picture, so I will try to explain as clearly as I can.
TT prompts me in a few different areas of the return, most commonly at the end, when I hit "Transmit Returns". I am then brought to a message that says something along the lines of "There are a few things that need attention". It then brings me to the first trade with a negative # in the Proceeds field. If you click on "Forms" at the top, it will switch to the Forms mode. From here, on the left section of the window, it will display all the trades. One of the headings is "Errors". Click on that, and it will highlight all the errors within the respective forms. At the bottom of the window are arrows that let you go to the next or previous error.
What I have been doing is cutting the number in the error amount (negative proceeds), changing that field "Sales Price Proceeds" to 0, then pasting that number into the "Cost or Other Basis" field, after removing the "-" symbol. This changes the entry from a negative gross proceeds amount with a 0 cost basis to instead a cost basis of the loss, with proceeds as 0.
