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Entering investment sales in forms mode is very complicated and error-prone. That's why TurboTax strongly recommends using the Step-by-Step interview to enter investment sales.
Remove all overrides from your tax return, and any forms that you created in forms mode. Then enter the sales using the interview. At the top of the screen where you enter the summary totals, where it asks for the "sales section," select "Long-term did not receive 1099-B form." That will create a Form 8949 page 2 with box F checked.
