Since (a) you have been in the USA only for the last three years ( i.e. entered USA on F-1 in 2016); (b) assuming that you have not been in the USA prior to 2016 on another F or J visa; (c) you are compliant with the condition s of your F visa ( i.e. a full time student / trainee at a qualified educational institution ), you are exempt from counting days present and therefore still a Non-Resident Alien for the year 2018.
Thus you report to the USA tax authorities ONLY US sourced / connected income and NOT world income. You file form 1040-NR ( not supported by TurboTax ). It is not material whether IT dept in India taxes your interest income or not -- you do not report this income nor do you get any foreign tax credit for taxes paid to another taxing authority.
Does this answer your query?
Namaste ji
