Suggest you see an accountant.
Unless you live in a community property state, an LLC with more than one member must be reported on a form 1065 partnership return. This requires Turbotax Business, which is different from "Home & Business" and is only available as a CD or download for PC, there is no Mac or online version. The deadline for filing form 1065 is March 15, not April, and there are substantial penalties for filing late unless you get an extension. As part of preparing the 1065, each partner will receive a K-1 statement that is entered on their personal tax return (form 1040).
You may have several years of tax returns to correct, and an accountant can help navigate the process, teach you what you need to know for the future, and help negotiate any penalties.
If you live in a community property state and the only two members of the LLC are spouses, then you file as a special entity where each spouse files a schedule C listing half the income and half the expenses.
