Etrade Cash bonus

I used TurboTax Premier to file my tax return. I received a cash bonus from ETRADE, which was reported on a 1099-MISC. The bonus was a promotional incentive for transferring additional funds to my ETRADE account.

When I entered this information in TurboTax Premier, it automatically generated a "Business Income and Expenses" form, even though the cash bonus was not related to any business activity.

How should I correctly handle this type of income in TurboTax?