Based on your statement of filing Form 1065, I'm assuming your LLC has elected to file as a partnership and not as a corporation.
Here is a link to the IRS website, Helpful Hints for Partnerships with Foreign Partners
https://www.irs.gov/individuals/international-taxpayers/helpful-hints-for-partnerships-with-foreign-...
This page has a lot of useful information and links to other pages for forms, instructions, and other information.
Link to Publication 541 Partnerships
https://www.irs.gov/publications/p541
Without doing a lot of research, Form 5472 appears to apply to a reporting corporation, not a partnership. But I didn't research that much. I suggest taking another look at that form and its instructions.
Your partnership might be liable for filing Form 8804, Form 8805, and / or Form 8813...depending on business etc., etc. You'll need to research those instructions and how they apply to the business of your partnership.
Link to instructions for Form 8804, 8805, and 8813
https://www.irs.gov/forms-pubs/about-form-8804
https://www.irs.gov/pub/irs-pdf/i8804.pdf
**Disclaimer: Effort has been made to offer correct information; but due to the discussion forum limitations, the poster disclaims any legal responsibility for the accuracy of the poster's response**
