Based on what you stated, you don't have to file a tax return (Form 1065) for your LLC taxed as a partnership. According to the IRS:
With some exceptions for foreign partnerships and Qualified Derivative Dealers ..."every domestic partnership must file Form 1065, unless it neither receives income nor incurs any expenditures treated as deductions or credits for federal income tax purposes."
"Entities formed as LLCs that are classified as partnerships for federal income tax purposes have the same filing requirements as domestic partnerships."
Be sure to dissolve your LLC with your state's Secretary of State or other applicable agency.
This is different than the rules that apply to corporations, including S-Corps and LLC's taxed as S-Corps and C-Corps.
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