I'm a current student and I don't work how should I file?

No.  If you are somebody's dependent, they should claim the tuition credit for your education. 

But, there are exceptions.  If you have scholarships that exceed your tuition by more than $12,550*, you have taxable income to be reported.

If you are a student and are not claimed as a dependent by someone else (e.g. your parent) you may be eligible for the up to $1000 refundable American Opportunity (tuition) Credit. You must be at least a half time degree seeking undergraduate student.  Unmarried, full time students under 24 are not eligible.

*$12,550 Total income from all sources

If you did not have any income and can be claimed as a dependent then you do not need to file a tax return. You won't be able to claim the education credits if you can be claimed as a dependent and have no income.