You can use TurboTax Business to prepare a Form 1065 - but that is a business only return. You still need a personal tax product to prepare your personal taxes on Form 1040. If you have a K-1 from a partnership or multimember LLC, that gets entered with your personal taxes on Form 1040. In that situation, you would not need TurboTax Business.
Do you own a partnership or multi member LLC that you need to prepare a business return for? Or do you just need to include a K-1 from a partnership or multimember LLC on your personal tax return? Or both?