If you have not opened for business yet and are just preparing, there is nothing to file for the business. Keep track of your expenses though because like Opus 17 said you will be able to deduct those expenses as start-up costs when you do open for business.
It sounds like you are a sole proprietor that has become an LLC but not elected to be taxed as an S-Corp. This would require filing a 2553 to request this tax treatment.
If this is the case, when you do open for business, you income and expenses would be reported with your personal return on a Schedule C.
These links will be helpful to you:
Self-Employed Tax Center
Tax information for Businesses
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