The other issue you need to make sure you understand is whether the partnership has filed a composite return on your behalf or if they just remitted withholding.
This is key, as if the partnership filed a composite return on your behalf, then you do not need to file a return; the partnership has done that for the eligible nonresident partners.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
