I am in the process of getting my residency but I created an LLC (Limited Liability Company), and I will offer AutoCAD drafting services to engineers and architects.

Do I need to wait until I become a resident, or citizen to fill W9 form for the company contacting me? I have tax ID number, also SSN.
The type of business I established is an LLC (Limited Liability Company).
I have no employees, just myself for now.
I will be giving AutoCAD drafting services as a consultant.