Yes you can file as a nonresident for 2021 because you did not meet the substantial presence test. Your F-1 visa days are exempt days so your "days present" in the US would not start until October 1.
Whether it's better to file as a nonresident and make the first-year choice would depend on your income and deductions.
TurboTax does not handle nonresident returns but you can discuss your situation with our partner Sprintax.com.
Contact them.
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