Thanks for bring out the message and I copied it here:
When and Where To File
Attach Form 8833 to your tax return
(Form 1040-NR, Form 1120-F, etc.). If
you would not otherwise be required to
file a tax return, you must file one at the
IRS Service Center where you would
normally file a return to make the treaty based return position disclosure under
section 6114 (see Regulations section
301.6114-1(a)(1)(ii)) or under Regulations
section 301.7701(b)-7.
As you can see, they normally consider that 8833 comes with 1040-NR not 1040. And what you said that I should send the form to a normal service center does not really align with what they stated in the document. Treaty based return is quite tricky.
