If you are an F-1 visa holders are considered non-resident aliens for the first 2 (non-student) or 5 (students) calendar years. Please refer to this US Tax Guide for Aliens for additional information about visa exemptions and the various filing requirements.
As a nonresident alien, you are only required to file a US tax return for income from US sources. If you are required to file a tax return, you will file a Form 1040NR. TurboTax does not support Form 1040NR but you can go to the following website https://www.sprintax.com/ which is specifically designed to help international students file 1040NRs.
