If you file late and owe taxes, you will by pay a late fee and interest along with your owed taxes. If you get a tax return then nothing really happens if you file late. I filed a year late one time because I wasn't aware that you should file taxes even if you had no income.
I used H&R block last year and they had this thing where if you get instant cash back for a return you pay them a portion of your return and I ended up paying them like $9 bucks or something to do my taxes, but if you have to pay taxes or you get a huge return then you'll probably have to pay the full amount. I think turbotax is a great solution if you have an idea of what you're doing. Generally student taxes are easy because there aren't many things to include beyond income, tuition and rent so doing it yourself isn't so bad.
If you're really not sure of yourself then yes you may want to look into having someone else do it for you just in case.