We aren't always going to be here to help you, but the 1040-X instructions will be.

Resident and nonresident aliens. Use Form 1040-X to
amend Form 1040-NR. Also use Form 1040-X if you should have
filed Form 1040 instead of Form 1040-NR, or vice versa.
If you are filing Form 1040-X on paper to amend Form
1040-NR, or to file the correct return, do the following.
• Enter your name, current address, and social security number
(SSN) or individual taxpayer identification number (ITIN) on the
front of Form 1040-X.
• Don’t enter any other information on page 1. Also don’t
complete Part I on page 2 of Form 1040-X.
• Enter in Part II—Explanation of Changes the reason you are
filing Form 1040-X.
• Complete a new or corrected return (Form 1040, 1040-SR,
1040-NR, etc.).
• Across the top of the new or corrected return, write
“Amended.”
• Attach the new or corrected return to the back of Form
1040-X.