Uhhh, does this sound right?

I made a little over $26k last year and my total withholdings (Federal, Medicare, SS) add up to about $3600. So far my Federal tax return, according to turbotax, is $30. Does this seem right? This is my first year filing completely independently because of weird education stuff so I'm not really sure. Last year my return was like $600 so I was kind of surprised.