You cannot transfer data between TT Home & Business and TT Business. This is true as it relates to both prior year data and current year data.
You can use TT Business to prepare a Form 1065 for a multi-member LLC, but you cannot use TT Business to prepare a Schedule C for a single-member LLC or a sole proprietorship. For a single-member LLC or sole proprietorship, you need a TT personal program that includes Schedule C, such as the TT Home & Business program you used to ask this question.