If you did not receive a separate tax id number (EIN) for the business, you are not required to include any business information with your return.
If your business was assigned an EIN before the end of the tax year, you may wish to include Schedule C for this business to avoid an inquiry from the IRS. Once you have an EIN, the IRS expects a return every year.
If this LLC is owned by more than one person, you are required to file Form 1065 Partnership Return every year, even if you had no income.
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