DaveF1006
Expert Alumni

After you file

No this would not change anything because the 1042-S is not a form that is filed with a US tax return. You still would not file an amendment with your return.

[Edited 03-09-2021|11:37 AM PST]

**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"