I think you are misreading something on the TD Ameritrade statement. They do not send you a Form 8949. They send you a Form 1099-B. You enter it under investment sales in the personal income section, not business income. Form 8949 is a form that TurboTax fills out as part of your tax return. The TD Ameritrade statement might mention certain boxes or other things that are on Form 8949, but it is not a Form 8949. Somewhere on that TD Ameritrade statement it says 1099-B.
