Since, it sounds like you are a Single Member LLC and your business was formed on November 6, 2006, you would file a Schedule C attached to your Federal 1040. On this schedule C, you would show business activity for the period between November 6 - December 31st. Although, you could have had start-up and organizational expenses which would have occured prior to the November 6th LLC formation date. You are able to expense the first $5,000 of start-up and organization expenses. However, in your case it looks like you missed the deadline to elect to expense the first $5,000. In that case, any start-up or organizational expenses you incurred will have to be amortized/expensed over a period of not less than 15 years. You must have had some expenses related to the formation of this new venture. Correct?
Additionally, if you are not required to file a Federal 1040 tax return according to the IRS rules and regulations regarding "Who Must File a Return" , then there is nothing you need to do. If you had formed a corporation or partnership, there would be Federal and State tax filings for these business entities regardless of whether or not you had any sales.
Have I fully answered your questions?
Correct your LLC is going to be taxed as a sole proprietorship if it is a Single Member LLC - which you have indicated. This is the IRS default classification for Single Member LLC`s - although you could have elected to be taxed as a coroporation. You would have had to have filled out a special election to do that. Your post does not indicate that you elected to change your entity status for tax purposes.
What type of entity was created? What is the fiscal year for the entity?
A corporate federal income tax return is generally due by the 15th of the third month after the year end.
You are required to file a return even if you did not have any taxable income.