If you have several tax returns to prepare, then TurboTax Desktop version seems to be the most cost-efficient.
Although any version of TurboTax Desktop (that is not the case for TurboTax Online) can handle situations you've described, the higher versions (Premier and Home & Business) are specifically designed for certain situation and have a step-by-step flow designed for those situations. I would recommend purchasing TurboTax Desktop Premier.
Having said that, if your LLC is a multi-member LLC or it elected to be treated as a corporation, in addition to the Premier version, you would need TurboTax Business to prepare an entity return.
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