If you are a single member LLC, you should not be using TurboTax BUSINESS> You should be using TurboTax Home and Business or TurboTax Premium online. If you are a single member LLC and did not elect to be treated as a S- Corp, you would be filing a Schedule C instead of a 1065. A 1065 if a partnership return.
If you are using TurboTax Business, you will need to switch to Home and Business or Premium.
If you chose to be treated as an S-Corp then you would file form 1120S using TurboTax BUSINESS.