You would need to amend your 2017 taxes. As a F-1 visa holder, you are considered as "exempt" (not counting days) for five years starting from the year you first enter the United States. In your situation, you are a nonresident for 2016-2020 and required to file a Form 1040-NR. If you have already filed with TurboTax, to amend from Form 1040 to 1040NR, please follow the following steps:
As TurboTax does not support any nonresident tax forms, you are recommended to use our affiliated partner, Sprintax to complete your Form 1040-NR.
1. Download the Form 1040-X from IRS website ( see below). On the front page of Form 1040-X, enter your name, current address, and social security number (SSN) or IRS individual taxpayer identification number (ITIN)
2. Do not enter any other information on page 1.
3. Do not complete Parts I or II on page 2 of Form 1040X.
4. Enter in Part III the reason why you are filing Form 1040X.
5. Complete a new Form 1040-NR by using Sprintax, see link above.
6. Across the top of the 1040-NR, write “Amended”
7. Attach the new Form 1040NR to the back of Form 1040X
For more information, see:
https://www.irs.gov/pub/irs-pdf/f1040x.pdf - form
https://www.irs.gov/pub/irs-pdf/i1040x.pdf - instructions
page 5 under Residents and Nonresidents
