Should I file my taxes even though it says $0 for state and fed? I was a full-time grad student in CA with only a 1098-E form. Is this right?

I live in CA and I'm a full-time grad student. I only have a 1098-T this year. No W2 and my 1098-E has $0 listed as well. I've used Turbotax for 5 years where I had a full-time income and I'm used to receiving refunds. Hence, I'm trepidation that I'm screwing up when every single field says $0 on it when I'm about to file. 

I earned no income this year and paid for school and living expenses with savings + gov loans.