Change W9 to EIN
In 2024 I used my SSN with the company I contract with. In 2025 I want to start using my EIN. This is because the business is picking up that I will hire subcontractors that I will start paying. Can I update my W9 with my sole proprietorships EIN or am I stuck using my using my SSN. I am asking for legality of it because the company is complaining I can't do that because they did not contract ABC Company they contracted me. I think they are wrong, but I wanted to check.