Hopefully you have a GOOD accountant
Generally, the extraction of your initial investment back from the LLC isn't taxable income to you. Where you run into potential taxable income issues is when you draw more cash, cumulatively, than the the total you've invested. In such case the excess of the former over the latter would be taxable gain.
Note that during the years the LLC operates, the amount of capital you can withdraw tax-free is generally increased by your share of any LLC income (which you've reported on your personal return), and reduced by your share of any LLC losses you've deducted on your 1040.
Kyle, the previous answer is very much appropriate. I also want to add that whenever there is income or loss in an LLC, it increases or decreases your adjusted basis in the company.
Your original investment is $100,000. If the LLC incurrs a loss of say $5,000 and you deduct this $5,000 on your personal return to reduce your taxable income then you can take out up to $95,000 in tax free money since your basis is reduced.
I also would advice you to have a competant accountant on your side.
For example, say I start up a new Florida LLC with a partner. I put in $100,000 as a capital investment to the LLC. This is money I have already paid taxes on as private income in previous years.
If I desolve the LLC in a few years, or decide the LLC does not need this capital lying around in liquid form anymore, how do I pull it out? Am I taxed on it again?