As a F-visa holder, you are considered as a nonresident for five years from the first year you entered the US. In your situation, you are a nonresident for 2015-2019. As a nonresident, you are required to file a Form 1040-NR. As TurboTax does not support any nonresident tax forms, you are advised to use Sprintax to file your Form 1040-NR to report your US source income including your Form 1099-B.
