You are correct ( and I am wrong ) --- section871(h) has repealed taxation on portfolio interest on most Non-Resident Aliens ( with a few exceptions -- that would not apply to you anyways ). Thank you from bring this to my attention.
Although you are probably going to have an issue in that IRS will have a copy of the 1099-INT ( which should not have been issued -- your bank should have been told that you are an US person. Do you have an SSN or ITIN or what?
Namaste
