It depends. Is your LLC a single member LLC? If so, then you can include your LLC business activity on your personal tax return and do not have to file a separate return for the business. You can use TurboTax Self Employment (online) or TurboTax Home & Business (CD/download) versions, plus you can use TurboTax Live if you are interested in getting live expert help in preparing your return.
If your LLC is a multimember LLC, then a separate return would need to be filed (Form 1065) using TurboTax Business.
Here is more information on TurboTax products:
TurboTax Online Products
Also, here is a link to the Tax Guide for Small Businesses:
https://www.irs.gov/publications/p334
