The shares refer to the legal structure, but for taxes all you need to do is enter your schedule K-1. When you sell your shares or shares pay you dividends, you may get other tax forms, such form 1099-DIV.
Typically your capital contributed is the only value at risk in your LLC. To enter in TurboTax while in your return, type schedule K-1 in the top right search box and select the first 'jump to' link.
If you have a more specific question, please comment it below.
