My business partner and I operate a digital marketing agency together. Before that we had separate Upwork accounts doing our own freelance work. Now that we're under a business together, we report all our earnings through the company - one single EIN. He is currently using our S-Corp's EIN for his Upwork account. Can I also attach the same EIN to my Upwork account? We still withdraw to separate bank accounts, but just report our earnings through the same business/EIN.