As a nonresident alien, you will have to file a Form 1040NR and cannot use TurboTax you will have to use the partner Sprintax site.
If you have already filed form 1040 for residents then you will have to amend your return, please see these instructions from TurboTaxLina how to amend your return:
https://ttlc.intuit.com/replies/6023806
