On a J1 visa you are considered a non-resident and will file a form 1040-NR to pay income tax on your US income only. Turbotax does not include form 1040-NR.
Turbotax recommends Sprintax for non-resident aliens, although there are also other providers. You will need your W-2 from your employer which will be sent by January 31, 2018. Make sure you can download your W-2 electronically from your university and/or make sure they have your home mailing address.
https://ttlc.intuit.com/replies/4028799
