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If the LLC is still active, even if there has been no income, you need to file with the IRS as well. Single member LLCs are flow through entities, which means that the information flows through to an individual's personal tax return. As you are not a U.S. citizen, you will need to complete the Form 1040-NR EZ or the 1040 NR. You will need to refer to the instructions to see which of these forms apply to your situation.
Link to 1040 NR EZ/instructions:
Link to Form 1040NR:
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