so what would suggest to make single person USA LLC tax free for Dubai resident ? any structure or setup
You can use Estonian director for this possibly even with zero substance. The benefit is that it's not blacklisted jurisdiction so easier on banking compliance.
Based on the treaty the US LLC will not become a tax resident in Estonia, as tax residence is based on domicile/place of incorporation, noting that there is no management and control test for the purpose of determining corporate residency in Estonian legislation.
Its only theoretically possible (based on the place of management) that the company would need to register a PE or a branch, so Estonian-sourced profits attributed to PE can be taxed in Estonia. Even if you do all business from Estonia with US LLC, there will be no tax payable in Estonia until profits are distributed/taken out from the branch/PE.
Estonian Director can show the tax office a POA to a representative outside Estonia who is making key management decisions, has access to bank accounts, etc.
Because it's not treated as a resident company local cfc rules don't apply either, and no need to submit public accounts for a registered PE.
Companies can have multiple PEs where profits are arising. Maybe some of the company's business is done in the Bahamas, Bermuda, Vanuatu, BVI or other nice places even from temporary offices rented through Airbnb.
As a bonus, by investing a little in substance, it is possible to get reliable EU banking and apply for a local residence permit. Substance locally can be a great way to access EU banking at reasonable fees. Everything can be managed online, including branch registration (if desired).
For US banking, EIN and a visit to e.g., NY is required.
feel free to pm