During this step, you collect and complete the relevant documents such as tax forms, bank details, certificates and licenses, and contact information. Yes, it is legal under US tax law.US tax law is concerned with collecting tax. Yes, you can be paid in USD and yes, the payment can be deposited in your US bank account. The second part of your question is obscure. If any address is added or updated, the Supplier Bank Account field will need to be filled in even if the information isn't changing. Country. Is it legal to have an overseas bank account in the US? Your question is very unclear. See also Establishing U.S. status for purposes of chapter 3 and chapter 4 withholding, earlier. What Is FATCA Reporting?