You have to file an amended return, Form 1040-X, with the correct Form 1040-NR attached. You cannot do this with TurboTax. Download Form 1040-X and its instructions from the following links on the IRS web site. You can easily complete the Form 1040-X by hand.
Form 1040-X
Instructions for Form 1040-X
Here is what the IRS instructions for Form 1040-X say to do for your situation.
• 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 Form 1040-NR return (see below).
• Across the top of the new return, write "Amended."
• Attach the new Form 1040-NR return to the back of Form
1040-X.
Since you are a student, you should be able to use Sprintax to prepare your Form 1040-NR (or 1040-NR-EZ) return. TurboTax has a partnership with Sprintax to prepare a 1040-NR federal tax return and corresponding state tax return for certain categories of nonresident aliens. Go to the following link for details and to get started. You will not be able to transfer information from TurboTax to Sprintax. You will have to start from the beginning in Sprintax.
Sprintax
An amended return cannot be e-filed. You have to print it and file it by mail. It normally takes the IRS up to 16 weeks to process an amended return. However, a while ago the IRS stopped processing mailed tax returns because of the Covid-19 pandemic. They may be starting to process them again this week, but they have reduced staff and a huge backlog, so it will be a long time before your amended return is processed.
Don't file the amended return until your original Form 1040 return has been accepted and you have received the original refund.
