@JLK20 kind of disagreeing here ( both with you and @rjs )-- I show below the instruction for form 1040-X
page 8-->
Resident and nonresident aliens. Use Form 1040-X to
amend Form 1040NR or Form 1040NR-EZ. Also, use Form
1040-X if you should have filed Form 1040 (or, for years before
2018, Form 1040, 1040A, or 1040EZ) instead of Form 1040NR
or 1040NR-EZ, or vice versa.
To amend Form 1040NR or 1040NR-EZ, 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 Parts I or II on page 2 of Form 1040-X.
• Enter in Part III the reason why you are filing Form 1040-X.
• Complete a new or corrected return (Form 1040, 1040-SR for
amended 2019 and later returns, Form 1040NR, 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.
The question here is what do they mean by "new" -- to me it means a new corrected return not a completely NEW
The same general information about the use of form 1040-X to AMEND is on page 35 of 2019 Pub 519-->
Amended Returns
and Claims for Refund
If you find changes in your income, deductions,
or credits after you mail your return, file Form
1040-X, Amended U.S. Individual Income Tax
Return. Also use Form 1040-X if you should
have filed Form 1040 or 1040-SR instead of
Form 1040-NR or 1040-NR-EZ, or vice versa.
If you amend Form 1040-NR or Form
1040-NR-EZ or file the correct return, print
“Amended” across the top, and attach the corrected
return (Form 1040, 1040-SR, Form
1040-NR, or 1040-NR-EZ) to Form 1040-X. Ordinarily,
an amended return claiming a refund
must be filed within 3 years from the date your
return was filed or within 2 years from the time
the tax was paid, whichever is later. A return
filed before the final due date is considered to
have been filed on the due date.
Note that here they are generally dealing with making the first year choice, filing with a resident spouse and/or cancel the choice and/or other reasons for amending the filed form. FILED here means a return filed on CORRECT form.
Hence I maintain my stand that you have to file a new return on form 1040-NR or 1040-NR-EZ , an explanation letter that the original 1040 was in error and attach a copy of the filed /accepted 1040 return. You will have to file by mail so it gets human intervention.
I am sure SprinTax will guide you through this -- they do have expertise in this area.
